21821240

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{77933}}^1$

素因数の和:77951

約数の個数: 32

約数和(自身を含む): 56112480

約数和(自身を除く): 34291240

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 77933, 155866, 311732, 389665, 545531, 623464, 779330, 1091062, 1558660, 2182124, 2727655, 3117320, 4364248, 5455310, 10910620, 21821240]

約数ペア:

[(1, 21821240), (2, 10910620), (4, 5455310), (5, 4364248), (7, 3117320), (8, 2727655), (10, 2182124), (14, 1558660), (20, 1091062), (28, 779330), (35, 623464), (40, 545531), (56, 389665), (70, 311732), (140, 155866), (280, 77933)]