21274220

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{59}}^1\times {\mathrm{149}}^1$

素因数の和:239

約数の個数: 72

約数和(自身を含む): 50274000

約数和(自身を除く): 28999780

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 59, 110, 118, 121, 149, 220, 236, 242, 295, 298, 484, 590, 596, 605, 649, 745, 1180, 1210, 1298, 1490, 1639, 2420, 2596, 2980, 3245, 3278, 6490, 6556, 7139, 8195, 8791, 12980, 14278, 16390, 17582, 18029, 28556, 32780, 35164, 35695, 36058, 43955, 71390, 72116, 87910, 90145, 96701, 142780, 175820, 180290, 193402, 360580, 386804, 483505, 967010, 1063711, 1934020, 2127422, 4254844, 5318555, 10637110, 21274220]

約数ペア:

[(1, 21274220), (2, 10637110), (4, 5318555), (5, 4254844), (10, 2127422), (11, 1934020), (20, 1063711), (22, 967010), (44, 483505), (55, 386804), (59, 360580), (110, 193402), (118, 180290), (121, 175820), (149, 142780), (220, 96701), (236, 90145), (242, 87910), (295, 72116), (298, 71390), (484, 43955), (590, 36058), (596, 35695), (605, 35164), (649, 32780), (745, 28556), (1180, 18029), (1210, 17582), (1298, 16390), (1490, 14278), (1639, 12980), (2420, 8791), (2596, 8195), (2980, 7139), (3245, 6556), (3278, 6490)]