20707520

素因数分解:

$2^6\times 5^1\times {\mathrm{163}}^1\times {\mathrm{397}}^1$

素因数の和:577

約数の個数: 56

約数和(自身を含む): 49737264

約数和(自身を除く): 29029744

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 163, 320, 326, 397, 652, 794, 815, 1304, 1588, 1630, 1985, 2608, 3176, 3260, 3970, 5216, 6352, 6520, 7940, 10432, 12704, 13040, 15880, 25408, 26080, 31760, 52160, 63520, 64711, 127040, 129422, 258844, 323555, 517688, 647110, 1035376, 1294220, 2070752, 2588440, 4141504, 5176880, 10353760, 20707520]

約数ペア:

[(1, 20707520), (2, 10353760), (4, 5176880), (5, 4141504), (8, 2588440), (10, 2070752), (16, 1294220), (20, 1035376), (32, 647110), (40, 517688), (64, 323555), (80, 258844), (160, 129422), (163, 127040), (320, 64711), (326, 63520), (397, 52160), (652, 31760), (794, 26080), (815, 25408), (1304, 15880), (1588, 13040), (1630, 12704), (1985, 10432), (2608, 7940), (3176, 6520), (3260, 6352), (3970, 5216)]