18321985

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{89}}^1\times {\mathrm{197}}^1$

素因数の和:321

約数の個数: 32

約数和(自身を含む): 25660800

約数和(自身を除く): 7338815

約数列:

[1, 5, 11, 19, 55, 89, 95, 197, 209, 445, 979, 985, 1045, 1691, 2167, 3743, 4895, 8455, 10835, 17533, 18601, 18715, 41173, 87665, 93005, 192863, 205865, 333127, 964315, 1665635, 3664397, 18321985]

約数ペア:

[(1, 18321985), (5, 3664397), (11, 1665635), (19, 964315), (55, 333127), (89, 205865), (95, 192863), (197, 93005), (209, 87665), (445, 41173), (979, 18715), (985, 18601), (1045, 17533), (1691, 10835), (2167, 8455), (3743, 4895)]