21590980

素因数分解:

$2^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{163}}^1\times {\mathrm{179}}^1$

素因数の和:388

約数の個数: 48

約数和(自身を含む): 47113920

約数和(自身を除く): 25522940

約数列:

[1, 2, 4, 5, 10, 20, 37, 74, 148, 163, 179, 185, 326, 358, 370, 652, 716, 740, 815, 895, 1630, 1790, 3260, 3580, 6031, 6623, 12062, 13246, 24124, 26492, 29177, 30155, 33115, 58354, 60310, 66230, 116708, 120620, 132460, 145885, 291770, 583540, 1079549, 2159098, 4318196, 5397745, 10795490, 21590980]

約数ペア:

[(1, 21590980), (2, 10795490), (4, 5397745), (5, 4318196), (10, 2159098), (20, 1079549), (37, 583540), (74, 291770), (148, 145885), (163, 132460), (179, 120620), (185, 116708), (326, 66230), (358, 60310), (370, 58354), (652, 33115), (716, 30155), (740, 29177), (815, 26492), (895, 24124), (1630, 13246), (1790, 12062), (3260, 6623), (3580, 6031)]