21721120

素因数分解:

$2^5\times 5^1\times {\mathrm{135757}}^1$

素因数の和:135772

約数の個数: 24

約数和(自身を含む): 51316524

約数和(自身を除く): 29595404

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 135757, 271514, 543028, 678785, 1086056, 1357570, 2172112, 2715140, 4344224, 5430280, 10860560, 21721120]

約数ペア:

[(1, 21721120), (2, 10860560), (4, 5430280), (5, 4344224), (8, 2715140), (10, 2172112), (16, 1357570), (20, 1086056), (32, 678785), (40, 543028), (80, 271514), (160, 135757)]