16821220

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{2087}}^1$

素因数の和:2140

約数の個数: 48

約数和(自身を含む): 39287808

約数和(自身を除く): 22466588

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 31, 52, 62, 65, 124, 130, 155, 260, 310, 403, 620, 806, 1612, 2015, 2087, 4030, 4174, 8060, 8348, 10435, 20870, 27131, 41740, 54262, 64697, 108524, 129394, 135655, 258788, 271310, 323485, 542620, 646970, 841061, 1293940, 1682122, 3364244, 4205305, 8410610, 16821220]

約数ペア:

[(1, 16821220), (2, 8410610), (4, 4205305), (5, 3364244), (10, 1682122), (13, 1293940), (20, 841061), (26, 646970), (31, 542620), (52, 323485), (62, 271310), (65, 258788), (124, 135655), (130, 129394), (155, 108524), (260, 64697), (310, 54262), (403, 41740), (620, 27131), (806, 20870), (1612, 10435), (2015, 8348), (2087, 8060), (4030, 4174)]