21105670

素因数分解:

$2^1\times 5^1\times {\mathrm{17}}^2\times {\mathrm{67}}^1\times {\mathrm{109}}^1$

素因数の和:217

約数の個数: 48

約数和(自身を含む): 41334480

約数和(自身を除く): 20228810

約数列:

[1, 2, 5, 10, 17, 34, 67, 85, 109, 134, 170, 218, 289, 335, 545, 578, 670, 1090, 1139, 1445, 1853, 2278, 2890, 3706, 5695, 7303, 9265, 11390, 14606, 18530, 19363, 31501, 36515, 38726, 63002, 73030, 96815, 124151, 157505, 193630, 248302, 315010, 620755, 1241510, 2110567, 4221134, 10552835, 21105670]

約数ペア:

[(1, 21105670), (2, 10552835), (5, 4221134), (10, 2110567), (17, 1241510), (34, 620755), (67, 315010), (85, 248302), (109, 193630), (134, 157505), (170, 124151), (218, 96815), (289, 73030), (335, 63002), (545, 38726), (578, 36515), (670, 31501), (1090, 19363), (1139, 18530), (1445, 14606), (1853, 11390), (2278, 9265), (2890, 7303), (3706, 5695)]