20557875

素因数分解:

$3^1\times 5^3\times {\mathrm{13}}^1\times {\mathrm{4217}}^1$

素因数の和:4248

約数の個数: 32

約数和(自身を含む): 36848448

約数和(自身を除く): 16290573

約数列:

[1, 3, 5, 13, 15, 25, 39, 65, 75, 125, 195, 325, 375, 975, 1625, 4217, 4875, 12651, 21085, 54821, 63255, 105425, 164463, 274105, 316275, 527125, 822315, 1370525, 1581375, 4111575, 6852625, 20557875]

約数ペア:

[(1, 20557875), (3, 6852625), (5, 4111575), (13, 1581375), (15, 1370525), (25, 822315), (39, 527125), (65, 316275), (75, 274105), (125, 164463), (195, 105425), (325, 63255), (375, 54821), (975, 21085), (1625, 12651), (4217, 4875)]