20453620

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{239}}^1\times {\mathrm{389}}^1$

素因数の和:648

約数の個数: 48

約数和(自身を含む): 47174400

約数和(自身を除く): 26720780

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 239, 389, 478, 778, 956, 1195, 1556, 1945, 2390, 2629, 3890, 4279, 4780, 5258, 7780, 8558, 10516, 13145, 17116, 21395, 26290, 42790, 52580, 85580, 92971, 185942, 371884, 464855, 929710, 1022681, 1859420, 2045362, 4090724, 5113405, 10226810, 20453620]

約数ペア:

[(1, 20453620), (2, 10226810), (4, 5113405), (5, 4090724), (10, 2045362), (11, 1859420), (20, 1022681), (22, 929710), (44, 464855), (55, 371884), (110, 185942), (220, 92971), (239, 85580), (389, 52580), (478, 42790), (778, 26290), (956, 21395), (1195, 17116), (1556, 13145), (1945, 10516), (2390, 8558), (2629, 7780), (3890, 5258), (4279, 4780)]