19919810

素因数分解:

$2^1\times 5^1\times {\mathrm{29}}^1\times {\mathrm{149}}^1\times {\mathrm{461}}^1$

素因数の和:646

約数の個数: 32

約数和(自身を含む): 37422000

約数和(自身を除く): 17502190

約数列:

[1, 2, 5, 10, 29, 58, 145, 149, 290, 298, 461, 745, 922, 1490, 2305, 4321, 4610, 8642, 13369, 21605, 26738, 43210, 66845, 68689, 133690, 137378, 343445, 686890, 1991981, 3983962, 9959905, 19919810]

約数ペア:

[(1, 19919810), (2, 9959905), (5, 3983962), (10, 1991981), (29, 686890), (58, 343445), (145, 137378), (149, 133690), (290, 68689), (298, 66845), (461, 43210), (745, 26738), (922, 21605), (1490, 13369), (2305, 8642), (4321, 4610)]