21427510

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^2\times {\mathrm{31}}^1\times {\mathrm{409}}^1$

素因数の和:473

約数の個数: 48

約数和(自身を含む): 43217280

約数和(自身を除く): 21789770

約数列:

[1, 2, 5, 10, 13, 26, 31, 62, 65, 130, 155, 169, 310, 338, 403, 409, 806, 818, 845, 1690, 2015, 2045, 4030, 4090, 5239, 5317, 10478, 10634, 12679, 25358, 26195, 26585, 52390, 53170, 63395, 69121, 126790, 138242, 164827, 329654, 345605, 691210, 824135, 1648270, 2142751, 4285502, 10713755, 21427510]

約数ペア:

[(1, 21427510), (2, 10713755), (5, 4285502), (10, 2142751), (13, 1648270), (26, 824135), (31, 691210), (62, 345605), (65, 329654), (130, 164827), (155, 138242), (169, 126790), (310, 69121), (338, 63395), (403, 53170), (409, 52390), (806, 26585), (818, 26195), (845, 25358), (1690, 12679), (2015, 10634), (2045, 10478), (4030, 5317), (4090, 5239)]