19400440

素因数分解:

$2^3\times 5^1\times {\mathrm{61}}^1\times {\mathrm{7951}}^1$

素因数の和:8023

約数の個数: 32

約数和(自身を含む): 44372160

約数和(自身を除く): 24971720

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 61, 122, 244, 305, 488, 610, 1220, 2440, 7951, 15902, 31804, 39755, 63608, 79510, 159020, 318040, 485011, 970022, 1940044, 2425055, 3880088, 4850110, 9700220, 19400440]

約数ペア:

[(1, 19400440), (2, 9700220), (4, 4850110), (5, 3880088), (8, 2425055), (10, 1940044), (20, 970022), (40, 485011), (61, 318040), (122, 159020), (244, 79510), (305, 63608), (488, 39755), (610, 31804), (1220, 15902), (2440, 7951)]