19940240

素因数分解:

$2^4\times 5^1\times {\mathrm{249253}}^1$

素因数の和:249266

約数の個数: 20

約数和(自身を含む): 46361244

約数和(自身を除く): 26421004

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 249253, 498506, 997012, 1246265, 1994024, 2492530, 3988048, 4985060, 9970120, 19940240]

約数ペア:

[(1, 19940240), (2, 9970120), (4, 4985060), (5, 3988048), (8, 2492530), (10, 1994024), (16, 1246265), (20, 997012), (40, 498506), (80, 249253)]