16688440

素因数分解:

$2^3\times 5^1\times {\mathrm{421}}^1\times {\mathrm{991}}^1$

素因数の和:1423

約数の個数: 32

約数和(自身を含む): 37676160

約数和(自身を除く): 20987720

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 421, 842, 991, 1684, 1982, 2105, 3368, 3964, 4210, 4955, 7928, 8420, 9910, 16840, 19820, 39640, 417211, 834422, 1668844, 2086055, 3337688, 4172110, 8344220, 16688440]

約数ペア:

[(1, 16688440), (2, 8344220), (4, 4172110), (5, 3337688), (8, 2086055), (10, 1668844), (20, 834422), (40, 417211), (421, 39640), (842, 19820), (991, 16840), (1684, 9910), (1982, 8420), (2105, 7928), (3368, 4955), (3964, 4210)]