21285825

素因数分解:

$3^1\times 5^2\times {\mathrm{11}}^1\times {\mathrm{25801}}^1$

素因数の和:25825

約数の個数: 24

約数和(自身を含む): 38393376

約数和(自身を除く): 17107551

約数列:

[1, 3, 5, 11, 15, 25, 33, 55, 75, 165, 275, 825, 25801, 77403, 129005, 283811, 387015, 645025, 851433, 1419055, 1935075, 4257165, 7095275, 21285825]

約数ペア:

[(1, 21285825), (3, 7095275), (5, 4257165), (11, 1935075), (15, 1419055), (25, 851433), (33, 645025), (55, 387015), (75, 283811), (165, 129005), (275, 77403), (825, 25801)]