21147477

素因数分解:

$3^1\times {\mathrm{13}}^2\times {\mathrm{53}}^1\times {\mathrm{787}}^1$

素因数の和:869

約数の個数: 24

約数和(自身を含む): 31148064

約数和(自身を除く): 10000587

約数列:

[1, 3, 13, 39, 53, 159, 169, 507, 689, 787, 2067, 2361, 8957, 10231, 26871, 30693, 41711, 125133, 133003, 399009, 542243, 1626729, 7049159, 21147477]

約数ペア:

[(1, 21147477), (3, 7049159), (13, 1626729), (39, 542243), (53, 399009), (159, 133003), (169, 125133), (507, 41711), (689, 30693), (787, 26871), (2067, 10231), (2361, 8957)]