20578905

素因数分解:

$3^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{59}}^1\times {\mathrm{337}}^1$

素因数の和:430

約数の個数: 48

約数和(自身を含む): 37964160

約数和(自身を除く): 17385255

約数列:

[1, 3, 5, 9, 15, 23, 45, 59, 69, 115, 177, 207, 295, 337, 345, 531, 885, 1011, 1035, 1357, 1685, 2655, 3033, 4071, 5055, 6785, 7751, 12213, 15165, 19883, 20355, 23253, 38755, 59649, 61065, 69759, 99415, 116265, 178947, 298245, 348795, 457309, 894735, 1371927, 2286545, 4115781, 6859635, 20578905]

約数ペア:

[(1, 20578905), (3, 6859635), (5, 4115781), (9, 2286545), (15, 1371927), (23, 894735), (45, 457309), (59, 348795), (69, 298245), (115, 178947), (177, 116265), (207, 99415), (295, 69759), (337, 61065), (345, 59649), (531, 38755), (885, 23253), (1011, 20355), (1035, 19883), (1357, 15165), (1685, 12213), (2655, 7751), (3033, 6785), (4071, 5055)]