21156525

素因数分解:

$3^3\times 5^2\times {\mathrm{13}}^1\times {\mathrm{2411}}^1$

素因数の和:2443

約数の個数: 48

約数和(自身を含む): 41872320

約数和(自身を除く): 20715795

約数列:

[1, 3, 5, 9, 13, 15, 25, 27, 39, 45, 65, 75, 117, 135, 195, 225, 325, 351, 585, 675, 975, 1755, 2411, 2925, 7233, 8775, 12055, 21699, 31343, 36165, 60275, 65097, 94029, 108495, 156715, 180825, 282087, 325485, 470145, 542475, 783575, 846261, 1410435, 1627425, 2350725, 4231305, 7052175, 21156525]

約数ペア:

[(1, 21156525), (3, 7052175), (5, 4231305), (9, 2350725), (13, 1627425), (15, 1410435), (25, 846261), (27, 783575), (39, 542475), (45, 470145), (65, 325485), (75, 282087), (117, 180825), (135, 156715), (195, 108495), (225, 94029), (325, 65097), (351, 60275), (585, 36165), (675, 31343), (975, 21699), (1755, 12055), (2411, 8775), (2925, 7233)]