278318975

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{79}}^1\times {\mathrm{557}}^1$

素因数の和:680

約数の個数: 48

約数和(自身を含む): 398545920

約数和(自身を除く): 120226945

約数列:

[1, 5, 11, 23, 25, 55, 79, 115, 253, 275, 395, 557, 575, 869, 1265, 1817, 1975, 2785, 4345, 6127, 6325, 9085, 12811, 13925, 19987, 21725, 30635, 44003, 45425, 64055, 99935, 140921, 153175, 220015, 320275, 484033, 499675, 704605, 1012069, 1100075, 2420165, 3523025, 5060345, 11132759, 12100825, 25301725, 55663795, 278318975]

約数ペア:

[(1, 278318975), (5, 55663795), (11, 25301725), (23, 12100825), (25, 11132759), (55, 5060345), (79, 3523025), (115, 2420165), (253, 1100075), (275, 1012069), (395, 704605), (557, 499675), (575, 484033), (869, 320275), (1265, 220015), (1817, 153175), (1975, 140921), (2785, 99935), (4345, 64055), (6127, 45425), (6325, 44003), (9085, 30635), (12811, 21725), (13925, 19987)]