21498620

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{7517}}^1$

素因数の和:7550

約数の個数: 48

約数和(自身を含む): 53047008

約数和(自身を除く): 31548388

約数列:

[1, 2, 4, 5, 10, 11, 13, 20, 22, 26, 44, 52, 55, 65, 110, 130, 143, 220, 260, 286, 572, 715, 1430, 2860, 7517, 15034, 30068, 37585, 75170, 82687, 97721, 150340, 165374, 195442, 330748, 390884, 413435, 488605, 826870, 977210, 1074931, 1653740, 1954420, 2149862, 4299724, 5374655, 10749310, 21498620]

約数ペア:

[(1, 21498620), (2, 10749310), (4, 5374655), (5, 4299724), (10, 2149862), (11, 1954420), (13, 1653740), (20, 1074931), (22, 977210), (26, 826870), (44, 488605), (52, 413435), (55, 390884), (65, 330748), (110, 195442), (130, 165374), (143, 150340), (220, 97721), (260, 82687), (286, 75170), (572, 37585), (715, 30068), (1430, 15034), (2860, 7517)]