21505510

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{263}}^1$

素因数の和:337

約数の個数: 64

約数和(自身を含む): 45505152

約数和(自身を除く): 23999642

約数列:

[1, 2, 5, 10, 13, 17, 26, 34, 37, 65, 74, 85, 130, 170, 185, 221, 263, 370, 442, 481, 526, 629, 962, 1105, 1258, 1315, 2210, 2405, 2630, 3145, 3419, 4471, 4810, 6290, 6838, 8177, 8942, 9731, 16354, 17095, 19462, 22355, 34190, 40885, 44710, 48655, 58123, 81770, 97310, 116246, 126503, 165427, 253006, 290615, 330854, 581230, 632515, 827135, 1265030, 1654270, 2150551, 4301102, 10752755, 21505510]

約数ペア:

[(1, 21505510), (2, 10752755), (5, 4301102), (10, 2150551), (13, 1654270), (17, 1265030), (26, 827135), (34, 632515), (37, 581230), (65, 330854), (74, 290615), (85, 253006), (130, 165427), (170, 126503), (185, 116246), (221, 97310), (263, 81770), (370, 58123), (442, 48655), (481, 44710), (526, 40885), (629, 34190), (962, 22355), (1105, 19462), (1258, 17095), (1315, 16354), (2210, 9731), (2405, 8942), (2630, 8177), (3145, 6838), (3419, 6290), (4471, 4810)]