21053267879

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{61}}^1\times {\mathrm{223}}^1\times {\mathrm{9613}}^1$

素因数の和:9927

約数の個数: 32

約数和(自身を含む): 25635692544

約数和(自身を除く): 4582424665

約数列:

[1, 7, 23, 61, 161, 223, 427, 1403, 1561, 5129, 9613, 9821, 13603, 35903, 67291, 95221, 221099, 312869, 586393, 1547693, 2143699, 2190083, 4104751, 13487039, 15005893, 49305077, 94409273, 130765639, 345135539, 915359473, 3007609697, 21053267879]

約数ペア:

[(1, 21053267879), (7, 3007609697), (23, 915359473), (61, 345135539), (161, 130765639), (223, 94409273), (427, 49305077), (1403, 15005893), (1561, 13487039), (5129, 4104751), (9613, 2190083), (9821, 2143699), (13603, 1547693), (35903, 586393), (67291, 312869), (95221, 221099)]