19878975

素因数分解:

$3^2\times 5^2\times {\mathrm{53}}^1\times {\mathrm{1667}}^1$

素因数の和:1736

約数の個数: 36

約数和(自身を含む): 36299016

約数和(自身を除く): 16420041

約数列:

[1, 3, 5, 9, 15, 25, 45, 53, 75, 159, 225, 265, 477, 795, 1325, 1667, 2385, 3975, 5001, 8335, 11925, 15003, 25005, 41675, 75015, 88351, 125025, 265053, 375075, 441755, 795159, 1325265, 2208775, 3975795, 6626325, 19878975]

約数ペア:

[(1, 19878975), (3, 6626325), (5, 3975795), (9, 2208775), (15, 1325265), (25, 795159), (45, 441755), (53, 375075), (75, 265053), (159, 125025), (225, 88351), (265, 75015), (477, 41675), (795, 25005), (1325, 15003), (1667, 11925), (2385, 8335), (3975, 5001)]