21357440

素因数分解:

$2^7\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{151}}^1$

素因数の和:200

約数の個数: 128

約数和(自身を含む): 58605120

約数和(自身を除く): 37247680

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 17, 20, 26, 32, 34, 40, 52, 64, 65, 68, 80, 85, 104, 128, 130, 136, 151, 160, 170, 208, 221, 260, 272, 302, 320, 340, 416, 442, 520, 544, 604, 640, 680, 755, 832, 884, 1040, 1088, 1105, 1208, 1360, 1510, 1664, 1768, 1963, 2080, 2176, 2210, 2416, 2567, 2720, 3020, 3536, 3926, 4160, 4420, 4832, 5134, 5440, 6040, 7072, 7852, 8320, 8840, 9664, 9815, 10268, 10880, 12080, 12835, 14144, 15704, 17680, 19328, 19630, 20536, 24160, 25670, 28288, 31408, 33371, 35360, 39260, 41072, 48320, 51340, 62816, 66742, 70720, 78520, 82144, 96640, 102680, 125632, 133484, 141440, 157040, 164288, 166855, 205360, 251264, 266968, 314080, 328576, 333710, 410720, 533936, 628160, 667420, 821440, 1067872, 1256320, 1334840, 1642880, 2135744, 2669680, 4271488, 5339360, 10678720, 21357440]

約数ペア:

[(1, 21357440), (2, 10678720), (4, 5339360), (5, 4271488), (8, 2669680), (10, 2135744), (13, 1642880), (16, 1334840), (17, 1256320), (20, 1067872), (26, 821440), (32, 667420), (34, 628160), (40, 533936), (52, 410720), (64, 333710), (65, 328576), (68, 314080), (80, 266968), (85, 251264), (104, 205360), (128, 166855), (130, 164288), (136, 157040), (151, 141440), (160, 133484), (170, 125632), (208, 102680), (221, 96640), (260, 82144), (272, 78520), (302, 70720), (320, 66742), (340, 62816), (416, 51340), (442, 48320), (520, 41072), (544, 39260), (604, 35360), (640, 33371), (680, 31408), (755, 28288), (832, 25670), (884, 24160), (1040, 20536), (1088, 19630), (1105, 19328), (1208, 17680), (1360, 15704), (1510, 14144), (1664, 12835), (1768, 12080), (1963, 10880), (2080, 10268), (2176, 9815), (2210, 9664), (2416, 8840), (2567, 8320), (2720, 7852), (3020, 7072), (3536, 6040), (3926, 5440), (4160, 5134), (4420, 4832)]