21985700

素因数分解:

$2^2\times 5^2\times {\mathrm{11}}^2\times {\mathrm{23}}^1\times {\mathrm{79}}^1$

素因数の和:138

約数の個数: 108

約数和(自身を含む): 55413120

約数和(自身を除く): 33427420

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 23, 25, 44, 46, 50, 55, 79, 92, 100, 110, 115, 121, 158, 220, 230, 242, 253, 275, 316, 395, 460, 484, 506, 550, 575, 605, 790, 869, 1012, 1100, 1150, 1210, 1265, 1580, 1738, 1817, 1975, 2300, 2420, 2530, 2783, 3025, 3476, 3634, 3950, 4345, 5060, 5566, 6050, 6325, 7268, 7900, 8690, 9085, 9559, 11132, 12100, 12650, 13915, 17380, 18170, 19118, 19987, 21725, 25300, 27830, 36340, 38236, 39974, 43450, 45425, 47795, 55660, 69575, 79948, 86900, 90850, 95590, 99935, 139150, 181700, 191180, 199870, 219857, 238975, 278300, 399740, 439714, 477950, 499675, 879428, 955900, 999350, 1099285, 1998700, 2198570, 4397140, 5496425, 10992850, 21985700]

約数ペア:

[(1, 21985700), (2, 10992850), (4, 5496425), (5, 4397140), (10, 2198570), (11, 1998700), (20, 1099285), (22, 999350), (23, 955900), (25, 879428), (44, 499675), (46, 477950), (50, 439714), (55, 399740), (79, 278300), (92, 238975), (100, 219857), (110, 199870), (115, 191180), (121, 181700), (158, 139150), (220, 99935), (230, 95590), (242, 90850), (253, 86900), (275, 79948), (316, 69575), (395, 55660), (460, 47795), (484, 45425), (506, 43450), (550, 39974), (575, 38236), (605, 36340), (790, 27830), (869, 25300), (1012, 21725), (1100, 19987), (1150, 19118), (1210, 18170), (1265, 17380), (1580, 13915), (1738, 12650), (1817, 12100), (1975, 11132), (2300, 9559), (2420, 9085), (2530, 8690), (2783, 7900), (3025, 7268), (3476, 6325), (3634, 6050), (3950, 5566), (4345, 5060)]