21246640

素因数分解:

$2^4\times 5^1\times {\mathrm{53}}^1\times {\mathrm{5011}}^1$

素因数の和:5077

約数の個数: 40

約数和(自身を含む): 50340528

約数和(自身を除く): 29093888

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 53, 80, 106, 212, 265, 424, 530, 848, 1060, 2120, 4240, 5011, 10022, 20044, 25055, 40088, 50110, 80176, 100220, 200440, 265583, 400880, 531166, 1062332, 1327915, 2124664, 2655830, 4249328, 5311660, 10623320, 21246640]

約数ペア:

[(1, 21246640), (2, 10623320), (4, 5311660), (5, 4249328), (8, 2655830), (10, 2124664), (16, 1327915), (20, 1062332), (40, 531166), (53, 400880), (80, 265583), (106, 200440), (212, 100220), (265, 80176), (424, 50110), (530, 40088), (848, 25055), (1060, 20044), (2120, 10022), (4240, 5011)]