261218518

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{557}}^1\times {\mathrm{21317}}^1$

素因数の和:21887

約数の個数: 16

約数和(自身を含む): 428235984

約数和(自身を除く): 167017466

約数列:

[1, 2, 11, 22, 557, 1114, 6127, 12254, 21317, 42634, 234487, 468974, 11873569, 23747138, 130609259, 261218518]

約数ペア:

[(1, 261218518), (2, 130609259), (11, 23747138), (22, 11873569), (557, 468974), (1114, 234487), (6127, 42634), (12254, 21317)]