18978160

素因数分解:

$2^4\times 5^1\times {\mathrm{157}}^1\times {\mathrm{1511}}^1$

素因数の和:1681

約数の個数: 40

約数和(自身を含む): 44434656

約数和(自身を除く): 25456496

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 157, 314, 628, 785, 1256, 1511, 1570, 2512, 3022, 3140, 6044, 6280, 7555, 12088, 12560, 15110, 24176, 30220, 60440, 120880, 237227, 474454, 948908, 1186135, 1897816, 2372270, 3795632, 4744540, 9489080, 18978160]

約数ペア:

[(1, 18978160), (2, 9489080), (4, 4744540), (5, 3795632), (8, 2372270), (10, 1897816), (16, 1186135), (20, 948908), (40, 474454), (80, 237227), (157, 120880), (314, 60440), (628, 30220), (785, 24176), (1256, 15110), (1511, 12560), (1570, 12088), (2512, 7555), (3022, 6280), (3140, 6044)]