21290920

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{76039}}^1$

素因数の和:76057

約数の個数: 32

約数和(自身を含む): 54748800

約数和(自身を除く): 33457880

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 76039, 152078, 304156, 380195, 532273, 608312, 760390, 1064546, 1520780, 2129092, 2661365, 3041560, 4258184, 5322730, 10645460, 21290920]

約数ペア:

[(1, 21290920), (2, 10645460), (4, 5322730), (5, 4258184), (7, 3041560), (8, 2661365), (10, 2129092), (14, 1520780), (20, 1064546), (28, 760390), (35, 608312), (40, 532273), (56, 380195), (70, 304156), (140, 152078), (280, 76039)]