21820820

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{155863}}^1$

素因数の和:155879

約数の個数: 24

約数和(自身を含む): 52370304

約数和(自身を除く): 30549484

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 155863, 311726, 623452, 779315, 1091041, 1558630, 2182082, 3117260, 4364164, 5455205, 10910410, 21820820]

約数ペア:

[(1, 21820820), (2, 10910410), (4, 5455205), (5, 4364164), (7, 3117260), (10, 2182082), (14, 1558630), (20, 1091041), (28, 779315), (35, 623452), (70, 311726), (140, 155863)]