21309925

素因数分解:

$5^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1$

素因数の和:95

約数の個数: 96

約数和(自身を含む): 37497600

約数和(自身を除く): 16187675

約数列:

[1, 5, 7, 13, 17, 19, 25, 29, 35, 65, 85, 91, 95, 119, 133, 145, 175, 203, 221, 247, 323, 325, 377, 425, 455, 475, 493, 551, 595, 665, 725, 1015, 1105, 1235, 1547, 1615, 1729, 1885, 2261, 2275, 2465, 2639, 2755, 2975, 3325, 3451, 3857, 4199, 5075, 5525, 6175, 6409, 7163, 7735, 8075, 8645, 9367, 9425, 11305, 12325, 13195, 13775, 17255, 19285, 20995, 29393, 32045, 35815, 38675, 43225, 44863, 46835, 50141, 56525, 65569, 65975, 86275, 96425, 104975, 121771, 146965, 160225, 179075, 224315, 234175, 250705, 327845, 608855, 734825, 852397, 1121575, 1253525, 1639225, 3044275, 4261985, 21309925]

約数ペア:

[(1, 21309925), (5, 4261985), (7, 3044275), (13, 1639225), (17, 1253525), (19, 1121575), (25, 852397), (29, 734825), (35, 608855), (65, 327845), (85, 250705), (91, 234175), (95, 224315), (119, 179075), (133, 160225), (145, 146965), (175, 121771), (203, 104975), (221, 96425), (247, 86275), (323, 65975), (325, 65569), (377, 56525), (425, 50141), (455, 46835), (475, 44863), (493, 43225), (551, 38675), (595, 35815), (665, 32045), (725, 29393), (1015, 20995), (1105, 19285), (1235, 17255), (1547, 13775), (1615, 13195), (1729, 12325), (1885, 11305), (2261, 9425), (2275, 9367), (2465, 8645), (2639, 8075), (2755, 7735), (2975, 7163), (3325, 6409), (3451, 6175), (3857, 5525), (4199, 5075)]