21886120

素因数分解:

$2^3\times 5^1\times {\mathrm{257}}^1\times {\mathrm{2129}}^1$

素因数の和:2397

約数の個数: 32

約数和(自身を含む): 49458600

約数和(自身を除く): 27572480

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 257, 514, 1028, 1285, 2056, 2129, 2570, 4258, 5140, 8516, 10280, 10645, 17032, 21290, 42580, 85160, 547153, 1094306, 2188612, 2735765, 4377224, 5471530, 10943060, 21886120]

約数ペア:

[(1, 21886120), (2, 10943060), (4, 5471530), (5, 4377224), (8, 2735765), (10, 2188612), (20, 1094306), (40, 547153), (257, 85160), (514, 42580), (1028, 21290), (1285, 17032), (2056, 10645), (2129, 10280), (2570, 8516), (4258, 5140)]