278897307

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{59}}^1\times {\mathrm{61}}^1\times {\mathrm{1987}}^1$

素因数の和:2123

約数の個数: 32

約数和(自身を含む): 414140160

約数和(自身を除く): 135242853

約数列:

[1, 3, 13, 39, 59, 61, 177, 183, 767, 793, 1987, 2301, 2379, 3599, 5961, 10797, 25831, 46787, 77493, 117233, 121207, 140361, 351699, 363621, 1524029, 1575691, 4572087, 4727073, 7151213, 21453639, 92965769, 278897307]

約数ペア:

[(1, 278897307), (3, 92965769), (13, 21453639), (39, 7151213), (59, 4727073), (61, 4572087), (177, 1575691), (183, 1524029), (767, 363621), (793, 351699), (1987, 140361), (2301, 121207), (2379, 117233), (3599, 77493), (5961, 46787), (10797, 25831)]