129999990

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{53}}^1\times {\mathrm{81761}}^1$

素因数の和:81824

約数の個数: 32

約数和(自身を含む): 317890656

約数和(自身を除く): 187890666

約数列:

[1, 2, 3, 5, 6, 10, 15, 30, 53, 106, 159, 265, 318, 530, 795, 1590, 81761, 163522, 245283, 408805, 490566, 817610, 1226415, 2452830, 4333333, 8666666, 12999999, 21666665, 25999998, 43333330, 64999995, 129999990]

約数ペア:

[(1, 129999990), (2, 64999995), (3, 43333330), (5, 25999998), (6, 21666665), (10, 12999999), (15, 8666666), (30, 4333333), (53, 2452830), (106, 1226415), (159, 817610), (265, 490566), (318, 408805), (530, 245283), (795, 163522), (1590, 81761)]