21971075

素因数分解:

$5^2\times 7^1\times {\mathrm{223}}^1\times {\mathrm{563}}^1$

素因数の和:803

約数の個数: 24

約数和(自身を含む): 31331328

約数和(自身を除く): 9360253

約数列:

[1, 5, 7, 25, 35, 175, 223, 563, 1115, 1561, 2815, 3941, 5575, 7805, 14075, 19705, 39025, 98525, 125549, 627745, 878843, 3138725, 4394215, 21971075]

約数ペア:

[(1, 21971075), (5, 4394215), (7, 3138725), (25, 878843), (35, 627745), (175, 125549), (223, 98525), (563, 39025), (1115, 19705), (1561, 14075), (2815, 7805), (3941, 5575)]