15988975

素因数分解:

$5^2\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{821}}^1$

素因数の和:891

約数の個数: 24

約数和(自身を含む): 21404880

約数和(自身を除く): 5415905

約数列:

[1, 5, 19, 25, 41, 95, 205, 475, 779, 821, 1025, 3895, 4105, 15599, 19475, 20525, 33661, 77995, 168305, 389975, 639559, 841525, 3197795, 15988975]

約数ペア:

[(1, 15988975), (5, 3197795), (19, 841525), (25, 639559), (41, 389975), (95, 168305), (205, 77995), (475, 33661), (779, 20525), (821, 19475), (1025, 15599), (3895, 4105)]