20280855

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{41}}^1\times {\mathrm{673}}^1$

素因数の和:736

約数の個数: 48

約数和(自身を含む): 38725344

約数和(自身を除く): 18444489

約数列:

[1, 3, 5, 7, 15, 21, 35, 41, 49, 105, 123, 147, 205, 245, 287, 615, 673, 735, 861, 1435, 2009, 2019, 3365, 4305, 4711, 6027, 10045, 10095, 14133, 23555, 27593, 30135, 32977, 70665, 82779, 98931, 137965, 164885, 193151, 413895, 494655, 579453, 965755, 1352057, 2897265, 4056171, 6760285, 20280855]

約数ペア:

[(1, 20280855), (3, 6760285), (5, 4056171), (7, 2897265), (15, 1352057), (21, 965755), (35, 579453), (41, 494655), (49, 413895), (105, 193151), (123, 164885), (147, 137965), (205, 98931), (245, 82779), (287, 70665), (615, 32977), (673, 30135), (735, 27593), (861, 23555), (1435, 14133), (2009, 10095), (2019, 10045), (3365, 6027), (4305, 4711)]