20810545

素因数分解:

$5^1\times 7^2\times {\mathrm{29}}^2\times {\mathrm{101}}^1$

素因数の和:178

約数の個数: 36

約数和(自身を含む): 30383964

約数和(自身を除く): 9573419

約数列:

[1, 5, 7, 29, 35, 49, 101, 145, 203, 245, 505, 707, 841, 1015, 1421, 2929, 3535, 4205, 4949, 5887, 7105, 14645, 20503, 24745, 29435, 41209, 84941, 102515, 143521, 206045, 424705, 594587, 717605, 2972935, 4162109, 20810545]

約数ペア:

[(1, 20810545), (5, 4162109), (7, 2972935), (29, 717605), (35, 594587), (49, 424705), (101, 206045), (145, 143521), (203, 102515), (245, 84941), (505, 41209), (707, 29435), (841, 24745), (1015, 20503), (1421, 14645), (2929, 7105), (3535, 5887), (4205, 4949)]