80821360

素因数分解:

$2^4\times 5^1\times {\mathrm{257}}^1\times {\mathrm{3931}}^1$

素因数の和:4201

約数の個数: 40

約数和(自身を含む): 188688816

約数和(自身を除く): 107867456

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 257, 514, 1028, 1285, 2056, 2570, 3931, 4112, 5140, 7862, 10280, 15724, 19655, 20560, 31448, 39310, 62896, 78620, 157240, 314480, 1010267, 2020534, 4041068, 5051335, 8082136, 10102670, 16164272, 20205340, 40410680, 80821360]

約数ペア:

[(1, 80821360), (2, 40410680), (4, 20205340), (5, 16164272), (8, 10102670), (10, 8082136), (16, 5051335), (20, 4041068), (40, 2020534), (80, 1010267), (257, 314480), (514, 157240), (1028, 78620), (1285, 62896), (2056, 39310), (2570, 31448), (3931, 20560), (4112, 19655), (5140, 15724), (7862, 10280)]