20747970

素因数分解:

$2^1\times 3^2\times 5^1\times {\mathrm{269}}^1\times {\mathrm{857}}^1$

素因数の和:1139

約数の個数: 48

約数和(自身を含む): 54208440

約数和(自身を除く): 33460470

約数列:

[1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 90, 269, 538, 807, 857, 1345, 1614, 1714, 2421, 2571, 2690, 4035, 4285, 4842, 5142, 7713, 8070, 8570, 12105, 12855, 15426, 24210, 25710, 38565, 77130, 230533, 461066, 691599, 1152665, 1383198, 2074797, 2305330, 3457995, 4149594, 6915990, 10373985, 20747970]

約数ペア:

[(1, 20747970), (2, 10373985), (3, 6915990), (5, 4149594), (6, 3457995), (9, 2305330), (10, 2074797), (15, 1383198), (18, 1152665), (30, 691599), (45, 461066), (90, 230533), (269, 77130), (538, 38565), (807, 25710), (857, 24210), (1345, 15426), (1614, 12855), (1714, 12105), (2421, 8570), (2571, 8070), (2690, 7713), (4035, 5142), (4285, 4842)]