21566480

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{89}}^1\times {\mathrm{233}}^1$

素因数の和:348

約数の個数: 80

約数和(自身を含む): 54840240

約数和(自身を除く): 33273760

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 89, 104, 130, 178, 208, 233, 260, 356, 445, 466, 520, 712, 890, 932, 1040, 1157, 1165, 1424, 1780, 1864, 2314, 2330, 3029, 3560, 3728, 4628, 4660, 5785, 6058, 7120, 9256, 9320, 11570, 12116, 15145, 18512, 18640, 20737, 23140, 24232, 30290, 41474, 46280, 48464, 60580, 82948, 92560, 103685, 121160, 165896, 207370, 242320, 269581, 331792, 414740, 539162, 829480, 1078324, 1347905, 1658960, 2156648, 2695810, 4313296, 5391620, 10783240, 21566480]

約数ペア:

[(1, 21566480), (2, 10783240), (4, 5391620), (5, 4313296), (8, 2695810), (10, 2156648), (13, 1658960), (16, 1347905), (20, 1078324), (26, 829480), (40, 539162), (52, 414740), (65, 331792), (80, 269581), (89, 242320), (104, 207370), (130, 165896), (178, 121160), (208, 103685), (233, 92560), (260, 82948), (356, 60580), (445, 48464), (466, 46280), (520, 41474), (712, 30290), (890, 24232), (932, 23140), (1040, 20737), (1157, 18640), (1165, 18512), (1424, 15145), (1780, 12116), (1864, 11570), (2314, 9320), (2330, 9256), (3029, 7120), (3560, 6058), (3728, 5785), (4628, 4660)]