15720220

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{1009}}^1$

素因数の和:1078

約数の個数: 48

約数和(自身を含む): 35632800

約数和(自身を除く): 19912580

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 41, 76, 82, 95, 164, 190, 205, 380, 410, 779, 820, 1009, 1558, 2018, 3116, 3895, 4036, 5045, 7790, 10090, 15580, 19171, 20180, 38342, 41369, 76684, 82738, 95855, 165476, 191710, 206845, 383420, 413690, 786011, 827380, 1572022, 3144044, 3930055, 7860110, 15720220]

約数ペア:

[(1, 15720220), (2, 7860110), (4, 3930055), (5, 3144044), (10, 1572022), (19, 827380), (20, 786011), (38, 413690), (41, 383420), (76, 206845), (82, 191710), (95, 165476), (164, 95855), (190, 82738), (205, 76684), (380, 41369), (410, 38342), (779, 20180), (820, 19171), (1009, 15580), (1558, 10090), (2018, 7790), (3116, 5045), (3895, 4036)]