20557980

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{181}}^1\times {\mathrm{631}}^1$

素因数の和:827

約数の個数: 72

約数和(自身を含む): 62803104

約数和(自身を除く): 42245124

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 181, 362, 543, 631, 724, 905, 1086, 1262, 1629, 1810, 1893, 2172, 2524, 2715, 3155, 3258, 3620, 3786, 5430, 5679, 6310, 6516, 7572, 8145, 9465, 10860, 11358, 12620, 16290, 18930, 22716, 28395, 32580, 37860, 56790, 113580, 114211, 228422, 342633, 456844, 571055, 685266, 1027899, 1142110, 1370532, 1713165, 2055798, 2284220, 3426330, 4111596, 5139495, 6852660, 10278990, 20557980]

約数ペア:

[(1, 20557980), (2, 10278990), (3, 6852660), (4, 5139495), (5, 4111596), (6, 3426330), (9, 2284220), (10, 2055798), (12, 1713165), (15, 1370532), (18, 1142110), (20, 1027899), (30, 685266), (36, 571055), (45, 456844), (60, 342633), (90, 228422), (180, 114211), (181, 113580), (362, 56790), (543, 37860), (631, 32580), (724, 28395), (905, 22716), (1086, 18930), (1262, 16290), (1629, 12620), (1810, 11358), (1893, 10860), (2172, 9465), (2524, 8145), (2715, 7572), (3155, 6516), (3258, 6310), (3620, 5679), (3786, 5430)]