21261825

素因数分解:

$3^3\times 5^2\times {\mathrm{13}}^1\times {\mathrm{2423}}^1$

素因数の和:2455

約数の個数: 48

約数和(自身を含む): 42080640

約数和(自身を除く): 20818815

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, 2423, 2925, 7269, 8775, 12115, 21807, 31499, 36345, 60575, 65421, 94497, 109035, 157495, 181725, 283491, 327105, 472485, 545175, 787475, 850473, 1417455, 1635525, 2362425, 4252365, 7087275, 21261825]

約数ペア:

[(1, 21261825), (3, 7087275), (5, 4252365), (9, 2362425), (13, 1635525), (15, 1417455), (25, 850473), (27, 787475), (39, 545175), (45, 472485), (65, 327105), (75, 283491), (117, 181725), (135, 157495), (195, 109035), (225, 94497), (325, 65421), (351, 60575), (585, 36345), (675, 31499), (975, 21807), (1755, 12115), (2423, 8775), (2925, 7269)]