21243860

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{61}}^1\times {\mathrm{1583}}^1$

素因数の和:1664

約数の個数: 48

約数和(自身を含む): 49496832

約数和(自身を除く): 28252972

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 61, 110, 122, 220, 244, 305, 610, 671, 1220, 1342, 1583, 2684, 3166, 3355, 6332, 6710, 7915, 13420, 15830, 17413, 31660, 34826, 69652, 87065, 96563, 174130, 193126, 348260, 386252, 482815, 965630, 1062193, 1931260, 2124386, 4248772, 5310965, 10621930, 21243860]

約数ペア:

[(1, 21243860), (2, 10621930), (4, 5310965), (5, 4248772), (10, 2124386), (11, 1931260), (20, 1062193), (22, 965630), (44, 482815), (55, 386252), (61, 348260), (110, 193126), (122, 174130), (220, 96563), (244, 87065), (305, 69652), (610, 34826), (671, 31660), (1220, 17413), (1342, 15830), (1583, 13420), (2684, 7915), (3166, 6710), (3355, 6332)]