21137025

素因数分解:

$3^1\times 5^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{163}}^1$

素因数の和:215

約数の個数: 96

約数和(自身を含む): 45552640

約数和(自身を除く): 24415615

約数列:

[1, 3, 5, 7, 13, 15, 19, 21, 25, 35, 39, 57, 65, 75, 91, 95, 105, 133, 163, 175, 195, 247, 273, 285, 325, 399, 455, 475, 489, 525, 665, 741, 815, 975, 1141, 1235, 1365, 1425, 1729, 1995, 2119, 2275, 2445, 3097, 3325, 3423, 3705, 4075, 5187, 5705, 6175, 6357, 6825, 8645, 9291, 9975, 10595, 12225, 14833, 15485, 17115, 18525, 21679, 25935, 28525, 31785, 40261, 43225, 44499, 46455, 52975, 65037, 74165, 77425, 85575, 108395, 120783, 129675, 158925, 201305, 222495, 232275, 281827, 325185, 370825, 541975, 603915, 845481, 1006525, 1112475, 1409135, 1625925, 3019575, 4227405, 7045675, 21137025]

約数ペア:

[(1, 21137025), (3, 7045675), (5, 4227405), (7, 3019575), (13, 1625925), (15, 1409135), (19, 1112475), (21, 1006525), (25, 845481), (35, 603915), (39, 541975), (57, 370825), (65, 325185), (75, 281827), (91, 232275), (95, 222495), (105, 201305), (133, 158925), (163, 129675), (175, 120783), (195, 108395), (247, 85575), (273, 77425), (285, 74165), (325, 65037), (399, 52975), (455, 46455), (475, 44499), (489, 43225), (525, 40261), (665, 31785), (741, 28525), (815, 25935), (975, 21679), (1141, 18525), (1235, 17115), (1365, 15485), (1425, 14833), (1729, 12225), (1995, 10595), (2119, 9975), (2275, 9291), (2445, 8645), (3097, 6825), (3325, 6357), (3423, 6175), (3705, 5705), (4075, 5187)]