18888920

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{15233}}^1$

素因数の和:15275

約数の個数: 32

約数和(自身を含む): 43873920

約数和(自身を除く): 24985000

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 124, 155, 248, 310, 620, 1240, 15233, 30466, 60932, 76165, 121864, 152330, 304660, 472223, 609320, 944446, 1888892, 2361115, 3777784, 4722230, 9444460, 18888920]

約数ペア:

[(1, 18888920), (2, 9444460), (4, 4722230), (5, 3777784), (8, 2361115), (10, 1888892), (20, 944446), (31, 609320), (40, 472223), (62, 304660), (124, 152330), (155, 121864), (248, 76165), (310, 60932), (620, 30466), (1240, 15233)]