21275150

素因数分解:

$2^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{461}}^1$

素因数の和:557

約数の個数: 48

約数和(自身を含む): 43309728

約数和(自身を除く): 22034578

約数列:

[1, 2, 5, 10, 13, 25, 26, 50, 65, 71, 130, 142, 325, 355, 461, 650, 710, 922, 923, 1775, 1846, 2305, 3550, 4610, 4615, 5993, 9230, 11525, 11986, 23050, 23075, 29965, 32731, 46150, 59930, 65462, 149825, 163655, 299650, 327310, 425503, 818275, 851006, 1636550, 2127515, 4255030, 10637575, 21275150]

約数ペア:

[(1, 21275150), (2, 10637575), (5, 4255030), (10, 2127515), (13, 1636550), (25, 851006), (26, 818275), (50, 425503), (65, 327310), (71, 299650), (130, 163655), (142, 149825), (325, 65462), (355, 59930), (461, 46150), (650, 32731), (710, 29965), (922, 23075), (923, 23050), (1775, 11986), (1846, 11525), (2305, 9230), (3550, 5993), (4610, 4615)]