28181320

素因数分解:

$2^3\times 5^1\times {\mathrm{71}}^1\times {\mathrm{9923}}^1$

素因数の和:10005

約数の個数: 32

約数和(自身を含む): 64307520

約数和(自身を除く): 36126200

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 71, 142, 284, 355, 568, 710, 1420, 2840, 9923, 19846, 39692, 49615, 79384, 99230, 198460, 396920, 704533, 1409066, 2818132, 3522665, 5636264, 7045330, 14090660, 28181320]

約数ペア:

[(1, 28181320), (2, 14090660), (4, 7045330), (5, 5636264), (8, 3522665), (10, 2818132), (20, 1409066), (40, 704533), (71, 396920), (142, 198460), (284, 99230), (355, 79384), (568, 49615), (710, 39692), (1420, 19846), (2840, 9923)]