19887561

素因数分解:

$3^2\times {\mathrm{53}}^1\times {\mathrm{173}}^1\times {\mathrm{241}}^1$

素因数の和:473

約数の個数: 24

約数和(自身を含む): 29559816

約数和(自身を除く): 9672255

約数列:

[1, 3, 9, 53, 159, 173, 241, 477, 519, 723, 1557, 2169, 9169, 12773, 27507, 38319, 41693, 82521, 114957, 125079, 375237, 2209729, 6629187, 19887561]

約数ペア:

[(1, 19887561), (3, 6629187), (9, 2209729), (53, 375237), (159, 125079), (173, 114957), (241, 82521), (477, 41693), (519, 38319), (723, 27507), (1557, 12773), (2169, 9169)]