21321825

素因数分解:

$3^1\times 5^2\times 7^1\times {\mathrm{17}}^1\times {\mathrm{2389}}^1$

素因数の和:2426

約数の個数: 48

約数和(自身を含む): 42675840

約数和(自身を除く): 21354015

約数列:

[1, 3, 5, 7, 15, 17, 21, 25, 35, 51, 75, 85, 105, 119, 175, 255, 357, 425, 525, 595, 1275, 1785, 2389, 2975, 7167, 8925, 11945, 16723, 35835, 40613, 50169, 59725, 83615, 121839, 179175, 203065, 250845, 284291, 418075, 609195, 852873, 1015325, 1254225, 1421455, 3045975, 4264365, 7107275, 21321825]

約数ペア:

[(1, 21321825), (3, 7107275), (5, 4264365), (7, 3045975), (15, 1421455), (17, 1254225), (21, 1015325), (25, 852873), (35, 609195), (51, 418075), (75, 284291), (85, 250845), (105, 203065), (119, 179175), (175, 121839), (255, 83615), (357, 59725), (425, 50169), (525, 40613), (595, 35835), (1275, 16723), (1785, 11945), (2389, 8925), (2975, 7167)]