19999990

素因数分解:

$2^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{71}}^1\times {\mathrm{1657}}^1$

素因数の和:1752

約数の個数: 32

約数和(自身を含む): 38677824

約数和(自身を除く): 18677834

約数列:

[1, 2, 5, 10, 17, 34, 71, 85, 142, 170, 355, 710, 1207, 1657, 2414, 3314, 6035, 8285, 12070, 16570, 28169, 56338, 117647, 140845, 235294, 281690, 588235, 1176470, 1999999, 3999998, 9999995, 19999990]

約数ペア:

[(1, 19999990), (2, 9999995), (5, 3999998), (10, 1999999), (17, 1176470), (34, 588235), (71, 281690), (85, 235294), (142, 140845), (170, 117647), (355, 56338), (710, 28169), (1207, 16570), (1657, 12070), (2414, 8285), (3314, 6035)]