20697640

素因数分解:

$2^3\times 5^1\times {\mathrm{67}}^1\times {\mathrm{7723}}^1$

素因数の和:7801

約数の個数: 32

約数和(自身を含む): 47270880

約数和(自身を除く): 26573240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 67, 134, 268, 335, 536, 670, 1340, 2680, 7723, 15446, 30892, 38615, 61784, 77230, 154460, 308920, 517441, 1034882, 2069764, 2587205, 4139528, 5174410, 10348820, 20697640]

約数ペア:

[(1, 20697640), (2, 10348820), (4, 5174410), (5, 4139528), (8, 2587205), (10, 2069764), (20, 1034882), (40, 517441), (67, 308920), (134, 154460), (268, 77230), (335, 61784), (536, 38615), (670, 30892), (1340, 15446), (2680, 7723)]