20685784

素因数分解:

$2^3\times 7^1\times {\mathrm{521}}^1\times {\mathrm{709}}^1$

素因数の和:1243

約数の個数: 32

約数和(自身を含む): 44474400

約数和(自身を除く): 23788616

約数列:

[1, 2, 4, 7, 8, 14, 28, 56, 521, 709, 1042, 1418, 2084, 2836, 3647, 4168, 4963, 5672, 7294, 9926, 14588, 19852, 29176, 39704, 369389, 738778, 1477556, 2585723, 2955112, 5171446, 10342892, 20685784]

約数ペア:

[(1, 20685784), (2, 10342892), (4, 5171446), (7, 2955112), (8, 2585723), (14, 1477556), (28, 738778), (56, 369389), (521, 39704), (709, 29176), (1042, 19852), (1418, 14588), (2084, 9926), (2836, 7294), (3647, 5672), (4168, 4963)]