21071025

素因数分解:

$3^2\times 5^2\times {\mathrm{71}}^1\times {\mathrm{1319}}^1$

素因数の和:1406

約数の個数: 36

約数和(自身を含む): 38301120

約数和(自身を除く): 17230095

約数列:

[1, 3, 5, 9, 15, 25, 45, 71, 75, 213, 225, 355, 639, 1065, 1319, 1775, 3195, 3957, 5325, 6595, 11871, 15975, 19785, 32975, 59355, 93649, 98925, 280947, 296775, 468245, 842841, 1404735, 2341225, 4214205, 7023675, 21071025]

約数ペア:

[(1, 21071025), (3, 7023675), (5, 4214205), (9, 2341225), (15, 1404735), (25, 842841), (45, 468245), (71, 296775), (75, 280947), (213, 98925), (225, 93649), (355, 59355), (639, 32975), (1065, 19785), (1319, 15975), (1775, 11871), (3195, 6595), (3957, 5325)]