639731421

素因数分解:

$3^2\times 7^1\times {\mathrm{967}}^1\times {\mathrm{10501}}^1$

素因数の和:11481

約数の個数: 24

約数和(自身を含む): 1057257344

約数和(自身を除く): 417525923

約数列:

[1, 3, 7, 9, 21, 63, 967, 2901, 6769, 8703, 10501, 20307, 31503, 60921, 73507, 94509, 220521, 661563, 10154467, 30463401, 71081269, 91390203, 213243807, 639731421]

約数ペア:

[(1, 639731421), (3, 213243807), (7, 91390203), (9, 71081269), (21, 30463401), (63, 10154467), (967, 661563), (2901, 220521), (6769, 94509), (8703, 73507), (10501, 60921), (20307, 31503)]