20371280

素因数分解:

$2^4\times 5^1\times {\mathrm{149}}^1\times {\mathrm{1709}}^1$

素因数の和:1871

約数の個数: 40

約数和(自身を含む): 47709000

約数和(自身を除く): 27337720

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 149, 298, 596, 745, 1192, 1490, 1709, 2384, 2980, 3418, 5960, 6836, 8545, 11920, 13672, 17090, 27344, 34180, 68360, 136720, 254641, 509282, 1018564, 1273205, 2037128, 2546410, 4074256, 5092820, 10185640, 20371280]

約数ペア:

[(1, 20371280), (2, 10185640), (4, 5092820), (5, 4074256), (8, 2546410), (10, 2037128), (16, 1273205), (20, 1018564), (40, 509282), (80, 254641), (149, 136720), (298, 68360), (596, 34180), (745, 27344), (1192, 17090), (1490, 13672), (1709, 11920), (2384, 8545), (2980, 6836), (3418, 5960)]