81788440

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{49871}}^1$

素因数の和:49923

約数の個数: 32

約数和(自身を含む): 188516160

約数和(自身を除く): 106727720

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 49871, 99742, 199484, 249355, 398968, 498710, 997420, 1994840, 2044711, 4089422, 8178844, 10223555, 16357688, 20447110, 40894220, 81788440]

約数ペア:

[(1, 81788440), (2, 40894220), (4, 20447110), (5, 16357688), (8, 10223555), (10, 8178844), (20, 4089422), (40, 2044711), (41, 1994840), (82, 997420), (164, 498710), (205, 398968), (328, 249355), (410, 199484), (820, 99742), (1640, 49871)]