21620475

素因数分解:

$3^2\times 5^2\times {\mathrm{307}}^1\times {\mathrm{313}}^1$

素因数の和:636

約数の個数: 36

約数和(自身を含む): 38974936

約数和(自身を除く): 17354461

約数列:

[1, 3, 5, 9, 15, 25, 45, 75, 225, 307, 313, 921, 939, 1535, 1565, 2763, 2817, 4605, 4695, 7675, 7825, 13815, 14085, 23025, 23475, 69075, 70425, 96091, 288273, 480455, 864819, 1441365, 2402275, 4324095, 7206825, 21620475]

約数ペア:

[(1, 21620475), (3, 7206825), (5, 4324095), (9, 2402275), (15, 1441365), (25, 864819), (45, 480455), (75, 288273), (225, 96091), (307, 70425), (313, 69075), (921, 23475), (939, 23025), (1535, 14085), (1565, 13815), (2763, 7825), (2817, 7675), (4605, 4695)]