21060325

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{137}}^1$

素因数の和:214

約数の個数: 48

約数和(自身を含む): 31622976

約数和(自身を除く): 10562651

約数列:

[1, 5, 11, 13, 25, 43, 55, 65, 137, 143, 215, 275, 325, 473, 559, 685, 715, 1075, 1507, 1781, 2365, 2795, 3425, 3575, 5891, 6149, 7535, 8905, 11825, 13975, 19591, 29455, 30745, 37675, 44525, 64801, 76583, 97955, 147275, 153725, 324005, 382915, 489775, 842413, 1620025, 1914575, 4212065, 21060325]

約数ペア:

[(1, 21060325), (5, 4212065), (11, 1914575), (13, 1620025), (25, 842413), (43, 489775), (55, 382915), (65, 324005), (137, 153725), (143, 147275), (215, 97955), (275, 76583), (325, 64801), (473, 44525), (559, 37675), (685, 30745), (715, 29455), (1075, 19591), (1507, 13975), (1781, 11825), (2365, 8905), (2795, 7535), (3425, 6149), (3575, 5891)]