20773880

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{53}}^1\times {\mathrm{239}}^1$

素因数の和:344

約数の個数: 64

約数和(自身を含む): 48988800

約数和(自身を除く): 28214920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 53, 82, 106, 164, 205, 212, 239, 265, 328, 410, 424, 478, 530, 820, 956, 1060, 1195, 1640, 1912, 2120, 2173, 2390, 4346, 4780, 8692, 9560, 9799, 10865, 12667, 17384, 19598, 21730, 25334, 39196, 43460, 48995, 50668, 63335, 78392, 86920, 97990, 101336, 126670, 195980, 253340, 391960, 506680, 519347, 1038694, 2077388, 2596735, 4154776, 5193470, 10386940, 20773880]

約数ペア:

[(1, 20773880), (2, 10386940), (4, 5193470), (5, 4154776), (8, 2596735), (10, 2077388), (20, 1038694), (40, 519347), (41, 506680), (53, 391960), (82, 253340), (106, 195980), (164, 126670), (205, 101336), (212, 97990), (239, 86920), (265, 78392), (328, 63335), (410, 50668), (424, 48995), (478, 43460), (530, 39196), (820, 25334), (956, 21730), (1060, 19598), (1195, 17384), (1640, 12667), (1912, 10865), (2120, 9799), (2173, 9560), (2390, 8692), (4346, 4780)]