21303275

素因数分解:

$5^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{149}}^1$

素因数の和:228

約数の個数: 48

約数和(自身を含む): 32736000

約数和(自身を除く): 11432725

約数列:

[1, 5, 7, 19, 25, 35, 43, 95, 133, 149, 175, 215, 301, 475, 665, 745, 817, 1043, 1075, 1505, 2831, 3325, 3725, 4085, 5215, 5719, 6407, 7525, 14155, 19817, 20425, 26075, 28595, 32035, 44849, 70775, 99085, 121733, 142975, 160175, 224245, 495425, 608665, 852131, 1121225, 3043325, 4260655, 21303275]

約数ペア:

[(1, 21303275), (5, 4260655), (7, 3043325), (19, 1121225), (25, 852131), (35, 608665), (43, 495425), (95, 224245), (133, 160175), (149, 142975), (175, 121733), (215, 99085), (301, 70775), (475, 44849), (665, 32035), (745, 28595), (817, 26075), (1043, 20425), (1075, 19817), (1505, 14155), (2831, 7525), (3325, 6407), (3725, 5719), (4085, 5215)]