664992811

素因数分解:

$7^1\times {\mathrm{31}}^1\times {\mathrm{131}}^1\times {\mathrm{149}}^1\times {\mathrm{157}}^1$

素因数の和:475

約数の個数: 32

約数和(自身を含む): 800870400

約数和(自身を除く): 135877589

約数列:

[1, 7, 31, 131, 149, 157, 217, 917, 1043, 1099, 4061, 4619, 4867, 19519, 20567, 23393, 28427, 32333, 34069, 136633, 143969, 163751, 605089, 637577, 725183, 3064483, 4235623, 4463039, 5076281, 21451381, 94998973, 664992811]

約数ペア:

[(1, 664992811), (7, 94998973), (31, 21451381), (131, 5076281), (149, 4463039), (157, 4235623), (217, 3064483), (917, 725183), (1043, 637577), (1099, 605089), (4061, 163751), (4619, 143969), (4867, 136633), (19519, 34069), (20567, 32333), (23393, 28427)]