138470920

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{494539}}^1$

素因数の和:494557

約数の個数: 32

約数和(自身を含む): 356068800

約数和(自身を除く): 217597880

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 494539, 989078, 1978156, 2472695, 3461773, 3956312, 4945390, 6923546, 9890780, 13847092, 17308865, 19781560, 27694184, 34617730, 69235460, 138470920]

約数ペア:

[(1, 138470920), (2, 69235460), (4, 34617730), (5, 27694184), (7, 19781560), (8, 17308865), (10, 13847092), (14, 9890780), (20, 6923546), (28, 4945390), (35, 3956312), (40, 3461773), (56, 2472695), (70, 1978156), (140, 989078), (280, 494539)]