18012020

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^2\times {\mathrm{73}}^2$

素因数の和:181

約数の個数: 54

約数和(自身を含む): 41527458

約数和(自身を除く): 23515438

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 73, 130, 146, 169, 260, 292, 338, 365, 676, 730, 845, 949, 1460, 1690, 1898, 3380, 3796, 4745, 5329, 9490, 10658, 12337, 18980, 21316, 24674, 26645, 49348, 53290, 61685, 69277, 106580, 123370, 138554, 246740, 277108, 346385, 692770, 900601, 1385540, 1801202, 3602404, 4503005, 9006010, 18012020]

約数ペア:

[(1, 18012020), (2, 9006010), (4, 4503005), (5, 3602404), (10, 1801202), (13, 1385540), (20, 900601), (26, 692770), (52, 346385), (65, 277108), (73, 246740), (130, 138554), (146, 123370), (169, 106580), (260, 69277), (292, 61685), (338, 53290), (365, 49348), (676, 26645), (730, 24674), (845, 21316), (949, 18980), (1460, 12337), (1690, 10658), (1898, 9490), (3380, 5329), (3796, 4745)]