21079225

素因数分解:

$5^2\times {\mathrm{31}}^1\times {\mathrm{59}}^1\times {\mathrm{461}}^1$

素因数の和:561

約数の個数: 24

約数和(自身を含む): 27498240

約数和(自身を除く): 6419015

約数列:

[1, 5, 25, 31, 59, 155, 295, 461, 775, 1475, 1829, 2305, 9145, 11525, 14291, 27199, 45725, 71455, 135995, 357275, 679975, 843169, 4215845, 21079225]

約数ペア:

[(1, 21079225), (5, 4215845), (25, 843169), (31, 679975), (59, 357275), (155, 135995), (295, 71455), (461, 45725), (775, 27199), (1475, 14291), (1829, 11525), (2305, 9145)]