21019575

素因数分解:

$3^1\times 5^2\times {\mathrm{47}}^1\times {\mathrm{67}}^1\times {\mathrm{89}}^1$

素因数の和:216

約数の個数: 48

約数和(自身を含む): 36426240

約数和(自身を除く): 15406665

約数列:

[1, 3, 5, 15, 25, 47, 67, 75, 89, 141, 201, 235, 267, 335, 445, 705, 1005, 1175, 1335, 1675, 2225, 3149, 3525, 4183, 5025, 5963, 6675, 9447, 12549, 15745, 17889, 20915, 29815, 47235, 62745, 78725, 89445, 104575, 149075, 236175, 280261, 313725, 447225, 840783, 1401305, 4203915, 7006525, 21019575]

約数ペア:

[(1, 21019575), (3, 7006525), (5, 4203915), (15, 1401305), (25, 840783), (47, 447225), (67, 313725), (75, 280261), (89, 236175), (141, 149075), (201, 104575), (235, 89445), (267, 78725), (335, 62745), (445, 47235), (705, 29815), (1005, 20915), (1175, 17889), (1335, 15745), (1675, 12549), (2225, 9447), (3149, 6675), (3525, 5963), (4183, 5025)]