39999980

素因数分解:

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

素因数の和:1754

約数の個数: 48

約数和(自身を含む): 90248256

約数和(自身を除く): 50248276

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 71, 85, 142, 170, 284, 340, 355, 710, 1207, 1420, 1657, 2414, 3314, 4828, 6035, 6628, 8285, 12070, 16570, 24140, 28169, 33140, 56338, 112676, 117647, 140845, 235294, 281690, 470588, 563380, 588235, 1176470, 1999999, 2352940, 3999998, 7999996, 9999995, 19999990, 39999980]

約数ペア:

[(1, 39999980), (2, 19999990), (4, 9999995), (5, 7999996), (10, 3999998), (17, 2352940), (20, 1999999), (34, 1176470), (68, 588235), (71, 563380), (85, 470588), (142, 281690), (170, 235294), (284, 140845), (340, 117647), (355, 112676), (710, 56338), (1207, 33140), (1420, 28169), (1657, 24140), (2414, 16570), (3314, 12070), (4828, 8285), (6035, 6628)]