20817340

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{53}}^1\times {\mathrm{479}}^1$

素因数の和:582

約数の個数: 48

約数和(自身を含む): 45722880

約数和(自身を除く): 24905540

約数列:

[1, 2, 4, 5, 10, 20, 41, 53, 82, 106, 164, 205, 212, 265, 410, 479, 530, 820, 958, 1060, 1916, 2173, 2395, 4346, 4790, 8692, 9580, 10865, 19639, 21730, 25387, 39278, 43460, 50774, 78556, 98195, 101548, 126935, 196390, 253870, 392780, 507740, 1040867, 2081734, 4163468, 5204335, 10408670, 20817340]

約数ペア:

[(1, 20817340), (2, 10408670), (4, 5204335), (5, 4163468), (10, 2081734), (20, 1040867), (41, 507740), (53, 392780), (82, 253870), (106, 196390), (164, 126935), (205, 101548), (212, 98195), (265, 78556), (410, 50774), (479, 43460), (530, 39278), (820, 25387), (958, 21730), (1060, 19639), (1916, 10865), (2173, 9580), (2395, 8692), (4346, 4790)]