21991725

素因数分解:

$3^2\times 5^2\times 7^1\times {\mathrm{13963}}^1$

素因数の和:13986

約数の個数: 36

約数和(自身を含む): 45019936

約数和(自身を除く): 23028211

約数列:

[1, 3, 5, 7, 9, 15, 21, 25, 35, 45, 63, 75, 105, 175, 225, 315, 525, 1575, 13963, 41889, 69815, 97741, 125667, 209445, 293223, 349075, 488705, 628335, 879669, 1047225, 1466115, 2443525, 3141675, 4398345, 7330575, 21991725]

約数ペア:

[(1, 21991725), (3, 7330575), (5, 4398345), (7, 3141675), (9, 2443525), (15, 1466115), (21, 1047225), (25, 879669), (35, 628335), (45, 488705), (63, 349075), (75, 293223), (105, 209445), (175, 125667), (225, 97741), (315, 69815), (525, 41889), (1575, 13963)]