21905125

素因数分解:

$5^3\times {\mathrm{11}}^1\times {\mathrm{89}}^1\times {\mathrm{179}}^1$

素因数の和:294

約数の個数: 32

約数和(自身を含む): 30326400

約数和(自身を除く): 8421275

約数列:

[1, 5, 11, 25, 55, 89, 125, 179, 275, 445, 895, 979, 1375, 1969, 2225, 4475, 4895, 9845, 11125, 15931, 22375, 24475, 49225, 79655, 122375, 175241, 246125, 398275, 876205, 1991375, 4381025, 21905125]

約数ペア:

[(1, 21905125), (5, 4381025), (11, 1991375), (25, 876205), (55, 398275), (89, 246125), (125, 175241), (179, 122375), (275, 79655), (445, 49225), (895, 24475), (979, 22375), (1375, 15931), (1969, 11125), (2225, 9845), (4475, 4895)]