21089080

素因数分解:

$2^3\times 5^1\times {\mathrm{139}}^1\times {\mathrm{3793}}^1$

素因数の和:3943

約数の個数: 32

約数和(自身を含む): 47804400

約数和(自身を除く): 26715320

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 139, 278, 556, 695, 1112, 1390, 2780, 3793, 5560, 7586, 15172, 18965, 30344, 37930, 75860, 151720, 527227, 1054454, 2108908, 2636135, 4217816, 5272270, 10544540, 21089080]

約数ペア:

[(1, 21089080), (2, 10544540), (4, 5272270), (5, 4217816), (8, 2636135), (10, 2108908), (20, 1054454), (40, 527227), (139, 151720), (278, 75860), (556, 37930), (695, 30344), (1112, 18965), (1390, 15172), (2780, 7586), (3793, 5560)]