81638320

素因数分解:

$2^4\times 5^1\times {\mathrm{179}}^1\times {\mathrm{5701}}^1$

素因数の和:5893

約数の個数: 40

約数和(自身を含む): 190902960

約数和(自身を除く): 109264640

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 179, 358, 716, 895, 1432, 1790, 2864, 3580, 5701, 7160, 11402, 14320, 22804, 28505, 45608, 57010, 91216, 114020, 228040, 456080, 1020479, 2040958, 4081916, 5102395, 8163832, 10204790, 16327664, 20409580, 40819160, 81638320]

約数ペア:

[(1, 81638320), (2, 40819160), (4, 20409580), (5, 16327664), (8, 10204790), (10, 8163832), (16, 5102395), (20, 4081916), (40, 2040958), (80, 1020479), (179, 456080), (358, 228040), (716, 114020), (895, 91216), (1432, 57010), (1790, 45608), (2864, 28505), (3580, 22804), (5701, 14320), (7160, 11402)]