16991560

素因数分解:

$2^3\times 5^1\times {\mathrm{421}}^1\times {\mathrm{1009}}^1$

素因数の和:1441

約数の個数: 32

約数和(自身を含む): 38359800

約数和(自身を除く): 21368240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 421, 842, 1009, 1684, 2018, 2105, 3368, 4036, 4210, 5045, 8072, 8420, 10090, 16840, 20180, 40360, 424789, 849578, 1699156, 2123945, 3398312, 4247890, 8495780, 16991560]

約数ペア:

[(1, 16991560), (2, 8495780), (4, 4247890), (5, 3398312), (8, 2123945), (10, 1699156), (20, 849578), (40, 424789), (421, 40360), (842, 20180), (1009, 16840), (1684, 10090), (2018, 8420), (2105, 8072), (3368, 5045), (4036, 4210)]