15890020

素因数分解:

$2^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{109}}^1\times {\mathrm{197}}^1$

素因数の和:352

約数の個数: 48

約数和(自身を含む): 34760880

約数和(自身を除く): 18870860

約数列:

[1, 2, 4, 5, 10, 20, 37, 74, 109, 148, 185, 197, 218, 370, 394, 436, 545, 740, 788, 985, 1090, 1970, 2180, 3940, 4033, 7289, 8066, 14578, 16132, 20165, 21473, 29156, 36445, 40330, 42946, 72890, 80660, 85892, 107365, 145780, 214730, 429460, 794501, 1589002, 3178004, 3972505, 7945010, 15890020]

約数ペア:

[(1, 15890020), (2, 7945010), (4, 3972505), (5, 3178004), (10, 1589002), (20, 794501), (37, 429460), (74, 214730), (109, 145780), (148, 107365), (185, 85892), (197, 80660), (218, 72890), (370, 42946), (394, 40330), (436, 36445), (545, 29156), (740, 21473), (788, 20165), (985, 16132), (1090, 14578), (1970, 8066), (2180, 7289), (3940, 4033)]