21300825

素因数分解:

$3^1\times 5^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{3121}}^1$

素因数の和:3154

約数の個数: 48

約数和(自身を含む): 43358336

約数和(自身を除く): 22057511

約数列:

[1, 3, 5, 7, 13, 15, 21, 25, 35, 39, 65, 75, 91, 105, 175, 195, 273, 325, 455, 525, 975, 1365, 2275, 3121, 6825, 9363, 15605, 21847, 40573, 46815, 65541, 78025, 109235, 121719, 202865, 234075, 284011, 327705, 546175, 608595, 852033, 1014325, 1420055, 1638525, 3042975, 4260165, 7100275, 21300825]

約数ペア:

[(1, 21300825), (3, 7100275), (5, 4260165), (7, 3042975), (13, 1638525), (15, 1420055), (21, 1014325), (25, 852033), (35, 608595), (39, 546175), (65, 327705), (75, 284011), (91, 234075), (105, 202865), (175, 121719), (195, 109235), (273, 78025), (325, 65541), (455, 46815), (525, 40573), (975, 21847), (1365, 15605), (2275, 9363), (3121, 6825)]