21626840

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{107}}^1\times {\mathrm{163}}^1$

素因数の和:312

約数の個数: 64

約数和(自身を含む): 51010560

約数和(自身を除く): 29383720

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 107, 124, 155, 163, 214, 248, 310, 326, 428, 535, 620, 652, 815, 856, 1070, 1240, 1304, 1630, 2140, 3260, 3317, 4280, 5053, 6520, 6634, 10106, 13268, 16585, 17441, 20212, 25265, 26536, 33170, 34882, 40424, 50530, 66340, 69764, 87205, 101060, 132680, 139528, 174410, 202120, 348820, 540671, 697640, 1081342, 2162684, 2703355, 4325368, 5406710, 10813420, 21626840]

約数ペア:

[(1, 21626840), (2, 10813420), (4, 5406710), (5, 4325368), (8, 2703355), (10, 2162684), (20, 1081342), (31, 697640), (40, 540671), (62, 348820), (107, 202120), (124, 174410), (155, 139528), (163, 132680), (214, 101060), (248, 87205), (310, 69764), (326, 66340), (428, 50530), (535, 40424), (620, 34882), (652, 33170), (815, 26536), (856, 25265), (1070, 20212), (1240, 17441), (1304, 16585), (1630, 13268), (2140, 10106), (3260, 6634), (3317, 6520), (4280, 5053)]