21275865

素因数分解:

$3^6\times 5^1\times {\mathrm{13}}^1\times {\mathrm{449}}^1$

素因数の和:485

約数の個数: 56

約数和(自身を含む): 41315400

約数和(自身を除く): 20039535

約数列:

[1, 3, 5, 9, 13, 15, 27, 39, 45, 65, 81, 117, 135, 195, 243, 351, 405, 449, 585, 729, 1053, 1215, 1347, 1755, 2245, 3159, 3645, 4041, 5265, 5837, 6735, 9477, 12123, 15795, 17511, 20205, 29185, 36369, 47385, 52533, 60615, 87555, 109107, 157599, 181845, 262665, 327321, 472797, 545535, 787995, 1418391, 1636605, 2363985, 4255173, 7091955, 21275865]

約数ペア:

[(1, 21275865), (3, 7091955), (5, 4255173), (9, 2363985), (13, 1636605), (15, 1418391), (27, 787995), (39, 545535), (45, 472797), (65, 327321), (81, 262665), (117, 181845), (135, 157599), (195, 109107), (243, 87555), (351, 60615), (405, 52533), (449, 47385), (585, 36369), (729, 29185), (1053, 20205), (1215, 17511), (1347, 15795), (1755, 12123), (2245, 9477), (3159, 6735), (3645, 5837), (4041, 5265)]