18905145

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{401}}^1\times {\mathrm{449}}^1$

素因数の和:865

約数の個数: 32

約数和(自身を含む): 34732800

約数和(自身を除く): 15827655

約数列:

[1, 3, 5, 7, 15, 21, 35, 105, 401, 449, 1203, 1347, 2005, 2245, 2807, 3143, 6015, 6735, 8421, 9429, 14035, 15715, 42105, 47145, 180049, 540147, 900245, 1260343, 2700735, 3781029, 6301715, 18905145]

約数ペア:

[(1, 18905145), (3, 6301715), (5, 3781029), (7, 2700735), (15, 1260343), (21, 900245), (35, 540147), (105, 180049), (401, 47145), (449, 42105), (1203, 15715), (1347, 14035), (2005, 9429), (2245, 8421), (2807, 6735), (3143, 6015)]