19885915

素因数分解:

$5^1\times 7^2\times {\mathrm{23}}^1\times {\mathrm{3529}}^1$

素因数の和:3571

約数の個数: 24

約数和(自身を含む): 28974240

約数和(自身を除く): 9088325

約数列:

[1, 5, 7, 23, 35, 49, 115, 161, 245, 805, 1127, 3529, 5635, 17645, 24703, 81167, 123515, 172921, 405835, 568169, 864605, 2840845, 3977183, 19885915]

約数ペア:

[(1, 19885915), (5, 3977183), (7, 2840845), (23, 864605), (35, 568169), (49, 405835), (115, 172921), (161, 123515), (245, 81167), (805, 24703), (1127, 17645), (3529, 5635)]