20814720

素因数分解:

$2^7\times 3^1\times 5^1\times {\mathrm{37}}^1\times {\mathrm{293}}^1$

素因数の和:352

約数の個数: 128

約数和(自身を含む): 68372640

約数和(自身を除く): 47557920

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 32, 37, 40, 48, 60, 64, 74, 80, 96, 111, 120, 128, 148, 160, 185, 192, 222, 240, 293, 296, 320, 370, 384, 444, 480, 555, 586, 592, 640, 740, 879, 888, 960, 1110, 1172, 1184, 1465, 1480, 1758, 1776, 1920, 2220, 2344, 2368, 2930, 2960, 3516, 3552, 4395, 4440, 4688, 4736, 5860, 5920, 7032, 7104, 8790, 8880, 9376, 10841, 11720, 11840, 14064, 14208, 17580, 17760, 18752, 21682, 23440, 23680, 28128, 32523, 35160, 35520, 37504, 43364, 46880, 54205, 56256, 65046, 70320, 71040, 86728, 93760, 108410, 112512, 130092, 140640, 162615, 173456, 187520, 216820, 260184, 281280, 325230, 346912, 433640, 520368, 562560, 650460, 693824, 867280, 1040736, 1300920, 1387648, 1734560, 2081472, 2601840, 3469120, 4162944, 5203680, 6938240, 10407360, 20814720]

約数ペア:

[(1, 20814720), (2, 10407360), (3, 6938240), (4, 5203680), (5, 4162944), (6, 3469120), (8, 2601840), (10, 2081472), (12, 1734560), (15, 1387648), (16, 1300920), (20, 1040736), (24, 867280), (30, 693824), (32, 650460), (37, 562560), (40, 520368), (48, 433640), (60, 346912), (64, 325230), (74, 281280), (80, 260184), (96, 216820), (111, 187520), (120, 173456), (128, 162615), (148, 140640), (160, 130092), (185, 112512), (192, 108410), (222, 93760), (240, 86728), (293, 71040), (296, 70320), (320, 65046), (370, 56256), (384, 54205), (444, 46880), (480, 43364), (555, 37504), (586, 35520), (592, 35160), (640, 32523), (740, 28128), (879, 23680), (888, 23440), (960, 21682), (1110, 18752), (1172, 17760), (1184, 17580), (1465, 14208), (1480, 14064), (1758, 11840), (1776, 11720), (1920, 10841), (2220, 9376), (2344, 8880), (2368, 8790), (2930, 7104), (2960, 7032), (3516, 5920), (3552, 5860), (4395, 4736), (4440, 4688)]