28571920

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{83}}^1\times {\mathrm{331}}^1$

素因数の和:440

約数の個数: 80

約数和(自身を含む): 72620352

約数和(自身を除く): 44048432

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 83, 104, 130, 166, 208, 260, 331, 332, 415, 520, 662, 664, 830, 1040, 1079, 1324, 1328, 1655, 1660, 2158, 2648, 3310, 3320, 4303, 4316, 5296, 5395, 6620, 6640, 8606, 8632, 10790, 13240, 17212, 17264, 21515, 21580, 26480, 27473, 34424, 43030, 43160, 54946, 68848, 86060, 86320, 109892, 137365, 172120, 219784, 274730, 344240, 357149, 439568, 549460, 714298, 1098920, 1428596, 1785745, 2197840, 2857192, 3571490, 5714384, 7142980, 14285960, 28571920]

約数ペア:

[(1, 28571920), (2, 14285960), (4, 7142980), (5, 5714384), (8, 3571490), (10, 2857192), (13, 2197840), (16, 1785745), (20, 1428596), (26, 1098920), (40, 714298), (52, 549460), (65, 439568), (80, 357149), (83, 344240), (104, 274730), (130, 219784), (166, 172120), (208, 137365), (260, 109892), (331, 86320), (332, 86060), (415, 68848), (520, 54946), (662, 43160), (664, 43030), (830, 34424), (1040, 27473), (1079, 26480), (1324, 21580), (1328, 21515), (1655, 17264), (1660, 17212), (2158, 13240), (2648, 10790), (3310, 8632), (3320, 8606), (4303, 6640), (4316, 6620), (5296, 5395)]