20671575

素因数分解:

$3^1\times 5^2\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{523}}^1$

素因数の和:584

約数の個数: 48

約数和(自身を含む): 37426176

約数和(自身を除く): 16754601

約数列:

[1, 3, 5, 15, 17, 25, 31, 51, 75, 85, 93, 155, 255, 425, 465, 523, 527, 775, 1275, 1569, 1581, 2325, 2615, 2635, 7845, 7905, 8891, 13075, 13175, 16213, 26673, 39225, 39525, 44455, 48639, 81065, 133365, 222275, 243195, 275621, 405325, 666825, 826863, 1215975, 1378105, 4134315, 6890525, 20671575]

約数ペア:

[(1, 20671575), (3, 6890525), (5, 4134315), (15, 1378105), (17, 1215975), (25, 826863), (31, 666825), (51, 405325), (75, 275621), (85, 243195), (93, 222275), (155, 133365), (255, 81065), (425, 48639), (465, 44455), (523, 39525), (527, 39225), (775, 26673), (1275, 16213), (1569, 13175), (1581, 13075), (2325, 8891), (2615, 7905), (2635, 7845)]