21672040

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{587}}^1$

素因数の和:682

約数の個数: 64

約数和(自身を含む): 53343360

約数和(自身を除く): 31671320

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 71, 104, 130, 142, 260, 284, 355, 520, 568, 587, 710, 923, 1174, 1420, 1846, 2348, 2840, 2935, 3692, 4615, 4696, 5870, 7384, 7631, 9230, 11740, 15262, 18460, 23480, 30524, 36920, 38155, 41677, 61048, 76310, 83354, 152620, 166708, 208385, 305240, 333416, 416770, 541801, 833540, 1083602, 1667080, 2167204, 2709005, 4334408, 5418010, 10836020, 21672040]

約数ペア:

[(1, 21672040), (2, 10836020), (4, 5418010), (5, 4334408), (8, 2709005), (10, 2167204), (13, 1667080), (20, 1083602), (26, 833540), (40, 541801), (52, 416770), (65, 333416), (71, 305240), (104, 208385), (130, 166708), (142, 152620), (260, 83354), (284, 76310), (355, 61048), (520, 41677), (568, 38155), (587, 36920), (710, 30524), (923, 23480), (1174, 18460), (1420, 15262), (1846, 11740), (2348, 9230), (2840, 7631), (2935, 7384), (3692, 5870), (4615, 4696)]