21727900

素因数分解:

$2^2\times 5^2\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{163}}^1$

素因数の和:251

約数の個数: 72

約数和(自身を含む): 50107904

約数和(自身を除く): 28380004

約数列:

[1, 2, 4, 5, 10, 20, 25, 31, 43, 50, 62, 86, 100, 124, 155, 163, 172, 215, 310, 326, 430, 620, 652, 775, 815, 860, 1075, 1333, 1550, 1630, 2150, 2666, 3100, 3260, 4075, 4300, 5053, 5332, 6665, 7009, 8150, 10106, 13330, 14018, 16300, 20212, 25265, 26660, 28036, 33325, 35045, 50530, 66650, 70090, 101060, 126325, 133300, 140180, 175225, 217279, 252650, 350450, 434558, 505300, 700900, 869116, 1086395, 2172790, 4345580, 5431975, 10863950, 21727900]

約数ペア:

[(1, 21727900), (2, 10863950), (4, 5431975), (5, 4345580), (10, 2172790), (20, 1086395), (25, 869116), (31, 700900), (43, 505300), (50, 434558), (62, 350450), (86, 252650), (100, 217279), (124, 175225), (155, 140180), (163, 133300), (172, 126325), (215, 101060), (310, 70090), (326, 66650), (430, 50530), (620, 35045), (652, 33325), (775, 28036), (815, 26660), (860, 25265), (1075, 20212), (1333, 16300), (1550, 14018), (1630, 13330), (2150, 10106), (2666, 8150), (3100, 7009), (3260, 6665), (4075, 5332), (4300, 5053)]