21136220

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{3511}}^1$

素因数の和:3570

約数の個数: 48

約数和(自身を含む): 51921408

約数和(自身を除く): 30785188

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 43, 70, 86, 140, 172, 215, 301, 430, 602, 860, 1204, 1505, 3010, 3511, 6020, 7022, 14044, 17555, 24577, 35110, 49154, 70220, 98308, 122885, 150973, 245770, 301946, 491540, 603892, 754865, 1056811, 1509730, 2113622, 3019460, 4227244, 5284055, 10568110, 21136220]

約数ペア:

[(1, 21136220), (2, 10568110), (4, 5284055), (5, 4227244), (7, 3019460), (10, 2113622), (14, 1509730), (20, 1056811), (28, 754865), (35, 603892), (43, 491540), (70, 301946), (86, 245770), (140, 150973), (172, 122885), (215, 98308), (301, 70220), (430, 49154), (602, 35110), (860, 24577), (1204, 17555), (1505, 14044), (3010, 7022), (3511, 6020)]