21816865

素因数分解:

$5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{991}}^1$

素因数の和:1057

約数の個数: 32

約数和(自身を含む): 32569344

約数和(自身を除く): 10752479

約数列:

[1, 5, 7, 17, 35, 37, 85, 119, 185, 259, 595, 629, 991, 1295, 3145, 4403, 4955, 6937, 16847, 22015, 34685, 36667, 84235, 117929, 183335, 256669, 589645, 623339, 1283345, 3116695, 4363373, 21816865]

約数ペア:

[(1, 21816865), (5, 4363373), (7, 3116695), (17, 1283345), (35, 623339), (37, 589645), (85, 256669), (119, 183335), (185, 117929), (259, 84235), (595, 36667), (629, 34685), (991, 22015), (1295, 16847), (3145, 6937), (4403, 4955)]