21715855

素因数分解:

$5^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{41}}^1\times {\mathrm{409}}^1$

素因数の和:499

約数の個数: 32

約数和(自身を含む): 31409280

約数和(自身を除く): 9693425

約数列:

[1, 5, 7, 35, 37, 41, 185, 205, 259, 287, 409, 1295, 1435, 1517, 2045, 2863, 7585, 10619, 14315, 15133, 16769, 53095, 75665, 83845, 105931, 117383, 529655, 586915, 620453, 3102265, 4343171, 21715855]

約数ペア:

[(1, 21715855), (5, 4343171), (7, 3102265), (35, 620453), (37, 586915), (41, 529655), (185, 117383), (205, 105931), (259, 83845), (287, 75665), (409, 53095), (1295, 16769), (1435, 15133), (1517, 14315), (2045, 10619), (2863, 7585)]