21357375

素因数分解:

$3^1\times 5^3\times {\mathrm{13}}^2\times {\mathrm{337}}^1$

素因数の和:381

約数の個数: 48

約数和(自身を含む): 38596896

約数和(自身を除く): 17239521

約数列:

[1, 3, 5, 13, 15, 25, 39, 65, 75, 125, 169, 195, 325, 337, 375, 507, 845, 975, 1011, 1625, 1685, 2535, 4225, 4381, 4875, 5055, 8425, 12675, 13143, 21125, 21905, 25275, 42125, 56953, 63375, 65715, 109525, 126375, 170859, 284765, 328575, 547625, 854295, 1423825, 1642875, 4271475, 7119125, 21357375]

約数ペア:

[(1, 21357375), (3, 7119125), (5, 4271475), (13, 1642875), (15, 1423825), (25, 854295), (39, 547625), (65, 328575), (75, 284765), (125, 170859), (169, 126375), (195, 109525), (325, 65715), (337, 63375), (375, 56953), (507, 42125), (845, 25275), (975, 21905), (1011, 21125), (1625, 13143), (1685, 12675), (2535, 8425), (4225, 5055), (4381, 4875)]