20459520

素因数分解:

$2^{12}\times 3^3\times 5^1\times {\mathrm{37}}^1$

素因数の和:75

約数の個数: 208

約数和(自身を含む): 74701920

約数和(自身を除く): 54242400

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 27, 30, 32, 36, 37, 40, 45, 48, 54, 60, 64, 72, 74, 80, 90, 96, 108, 111, 120, 128, 135, 144, 148, 160, 180, 185, 192, 216, 222, 240, 256, 270, 288, 296, 320, 333, 360, 370, 384, 432, 444, 480, 512, 540, 555, 576, 592, 640, 666, 720, 740, 768, 864, 888, 960, 999, 1024, 1080, 1110, 1152, 1184, 1280, 1332, 1440, 1480, 1536, 1665, 1728, 1776, 1920, 1998, 2048, 2160, 2220, 2304, 2368, 2560, 2664, 2880, 2960, 3072, 3330, 3456, 3552, 3840, 3996, 4096, 4320, 4440, 4608, 4736, 4995, 5120, 5328, 5760, 5920, 6144, 6660, 6912, 7104, 7680, 7992, 8640, 8880, 9216, 9472, 9990, 10240, 10656, 11520, 11840, 12288, 13320, 13824, 14208, 15360, 15984, 17280, 17760, 18432, 18944, 19980, 20480, 21312, 23040, 23680, 26640, 27648, 28416, 30720, 31968, 34560, 35520, 36864, 37888, 39960, 42624, 46080, 47360, 53280, 55296, 56832, 61440, 63936, 69120, 71040, 75776, 79920, 85248, 92160, 94720, 106560, 110592, 113664, 127872, 138240, 142080, 151552, 159840, 170496, 184320, 189440, 213120, 227328, 255744, 276480, 284160, 319680, 340992, 378880, 426240, 454656, 511488, 552960, 568320, 639360, 681984, 757760, 852480, 1022976, 1136640, 1278720, 1363968, 1704960, 2045952, 2273280, 2557440, 3409920, 4091904, 5114880, 6819840, 10229760, 20459520]

約数ペア:

[(1, 20459520), (2, 10229760), (3, 6819840), (4, 5114880), (5, 4091904), (6, 3409920), (8, 2557440), (9, 2273280), (10, 2045952), (12, 1704960), (15, 1363968), (16, 1278720), (18, 1136640), (20, 1022976), (24, 852480), (27, 757760), (30, 681984), (32, 639360), (36, 568320), (37, 552960), (40, 511488), (45, 454656), (48, 426240), (54, 378880), (60, 340992), (64, 319680), (72, 284160), (74, 276480), (80, 255744), (90, 227328), (96, 213120), (108, 189440), (111, 184320), (120, 170496), (128, 159840), (135, 151552), (144, 142080), (148, 138240), (160, 127872), (180, 113664), (185, 110592), (192, 106560), (216, 94720), (222, 92160), (240, 85248), (256, 79920), (270, 75776), (288, 71040), (296, 69120), (320, 63936), (333, 61440), (360, 56832), (370, 55296), (384, 53280), (432, 47360), (444, 46080), (480, 42624), (512, 39960), (540, 37888), (555, 36864), (576, 35520), (592, 34560), (640, 31968), (666, 30720), (720, 28416), (740, 27648), (768, 26640), (864, 23680), (888, 23040), (960, 21312), (999, 20480), (1024, 19980), (1080, 18944), (1110, 18432), (1152, 17760), (1184, 17280), (1280, 15984), (1332, 15360), (1440, 14208), (1480, 13824), (1536, 13320), (1665, 12288), (1728, 11840), (1776, 11520), (1920, 10656), (1998, 10240), (2048, 9990), (2160, 9472), (2220, 9216), (2304, 8880), (2368, 8640), (2560, 7992), (2664, 7680), (2880, 7104), (2960, 6912), (3072, 6660), (3330, 6144), (3456, 5920), (3552, 5760), (3840, 5328), (3996, 5120), (4096, 4995), (4320, 4736), (4440, 4608)]