21901995

素因数分解:

$3^4\times 5^1\times {\mathrm{41}}^1\times {\mathrm{1319}}^1$

素因数の和:1377

約数の個数: 40

約数和(自身を含む): 40249440

約数和(自身を除く): 18347445

約数列:

[1, 3, 5, 9, 15, 27, 41, 45, 81, 123, 135, 205, 369, 405, 615, 1107, 1319, 1845, 3321, 3957, 5535, 6595, 11871, 16605, 19785, 35613, 54079, 59355, 106839, 162237, 178065, 270395, 486711, 534195, 811185, 1460133, 2433555, 4380399, 7300665, 21901995]

約数ペア:

[(1, 21901995), (3, 7300665), (5, 4380399), (9, 2433555), (15, 1460133), (27, 811185), (41, 534195), (45, 486711), (81, 270395), (123, 178065), (135, 162237), (205, 106839), (369, 59355), (405, 54079), (615, 35613), (1107, 19785), (1319, 16605), (1845, 11871), (3321, 6595), (3957, 5535)]