64640640

素因数分解:

$2^7\times 3^1\times 5^1\times {\mathrm{131}}^1\times {\mathrm{257}}^1$

素因数の和:410

約数の個数: 128

約数和(自身を含む): 208422720

約数和(自身を除く): 143782080

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 32, 40, 48, 60, 64, 80, 96, 120, 128, 131, 160, 192, 240, 257, 262, 320, 384, 393, 480, 514, 524, 640, 655, 771, 786, 960, 1028, 1048, 1285, 1310, 1542, 1572, 1920, 1965, 2056, 2096, 2570, 2620, 3084, 3144, 3855, 3930, 4112, 4192, 5140, 5240, 6168, 6288, 7710, 7860, 8224, 8384, 10280, 10480, 12336, 12576, 15420, 15720, 16448, 16768, 20560, 20960, 24672, 25152, 30840, 31440, 32896, 33667, 41120, 41920, 49344, 50304, 61680, 62880, 67334, 82240, 83840, 98688, 101001, 123360, 125760, 134668, 164480, 168335, 202002, 246720, 251520, 269336, 336670, 404004, 493440, 505005, 538672, 673340, 808008, 1010010, 1077344, 1346680, 1616016, 2020020, 2154688, 2693360, 3232032, 4040040, 4309376, 5386720, 6464064, 8080080, 10773440, 12928128, 16160160, 21546880, 32320320, 64640640]

約数ペア:

[(1, 64640640), (2, 32320320), (3, 21546880), (4, 16160160), (5, 12928128), (6, 10773440), (8, 8080080), (10, 6464064), (12, 5386720), (15, 4309376), (16, 4040040), (20, 3232032), (24, 2693360), (30, 2154688), (32, 2020020), (40, 1616016), (48, 1346680), (60, 1077344), (64, 1010010), (80, 808008), (96, 673340), (120, 538672), (128, 505005), (131, 493440), (160, 404004), (192, 336670), (240, 269336), (257, 251520), (262, 246720), (320, 202002), (384, 168335), (393, 164480), (480, 134668), (514, 125760), (524, 123360), (640, 101001), (655, 98688), (771, 83840), (786, 82240), (960, 67334), (1028, 62880), (1048, 61680), (1285, 50304), (1310, 49344), (1542, 41920), (1572, 41120), (1920, 33667), (1965, 32896), (2056, 31440), (2096, 30840), (2570, 25152), (2620, 24672), (3084, 20960), (3144, 20560), (3855, 16768), (3930, 16448), (4112, 15720), (4192, 15420), (5140, 12576), (5240, 12336), (6168, 10480), (6288, 10280), (7710, 8384), (7860, 8224)]