39940240

素因数分解:

$2^4\times 5^1\times {\mathrm{499253}}^1$

素因数の和:499266

約数の個数: 20

約数和(自身を含む): 92861244

約数和(自身を除く): 52921004

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 499253, 998506, 1997012, 2496265, 3994024, 4992530, 7988048, 9985060, 19970120, 39940240]

約数ペア:

[(1, 39940240), (2, 19970120), (4, 9985060), (5, 7988048), (8, 4992530), (10, 3994024), (16, 2496265), (20, 1997012), (40, 998506), (80, 499253)]