81767320

素因数分解:

$2^3\times 5^1\times {\mathrm{163}}^1\times {\mathrm{12541}}^1$

素因数の和:12715

約数の個数: 32

約数和(自身を含む): 185119920

約数和(自身を除く): 103352600

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 163, 326, 652, 815, 1304, 1630, 3260, 6520, 12541, 25082, 50164, 62705, 100328, 125410, 250820, 501640, 2044183, 4088366, 8176732, 10220915, 16353464, 20441830, 40883660, 81767320]

約数ペア:

[(1, 81767320), (2, 40883660), (4, 20441830), (5, 16353464), (8, 10220915), (10, 8176732), (20, 4088366), (40, 2044183), (163, 501640), (326, 250820), (652, 125410), (815, 100328), (1304, 62705), (1630, 50164), (3260, 25082), (6520, 12541)]