21493561825

素因数分解:

$5^2\times {\mathrm{43}}^2\times {\mathrm{491}}^1\times {\mathrm{947}}^1$

素因数の和:1534

約数の個数: 36

約数和(自身を含む): 27370690128

約数和(自身を除く): 5877128303

約数列:

[1, 5, 25, 43, 215, 491, 947, 1075, 1849, 2455, 4735, 9245, 12275, 21113, 23675, 40721, 46225, 105565, 203605, 464977, 527825, 907859, 1018025, 1751003, 2324885, 4539295, 8755015, 11624425, 19994011, 22696475, 43775075, 99970055, 499850275, 859742473, 4298712365, 21493561825]

約数ペア:

[(1, 21493561825), (5, 4298712365), (25, 859742473), (43, 499850275), (215, 99970055), (491, 43775075), (947, 22696475), (1075, 19994011), (1849, 11624425), (2455, 8755015), (4735, 4539295), (9245, 2324885), (12275, 1751003), (21113, 1018025), (23675, 907859), (40721, 527825), (46225, 464977), (105565, 203605)]