18012920

素因数分解:

$2^3\times 5^1\times {\mathrm{401}}^1\times {\mathrm{1123}}^1$

素因数の和:1535

約数の個数: 32

約数和(自身を含む): 40666320

約数和(自身を除く): 22653400

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 401, 802, 1123, 1604, 2005, 2246, 3208, 4010, 4492, 5615, 8020, 8984, 11230, 16040, 22460, 44920, 450323, 900646, 1801292, 2251615, 3602584, 4503230, 9006460, 18012920]

約数ペア:

[(1, 18012920), (2, 9006460), (4, 4503230), (5, 3602584), (8, 2251615), (10, 1801292), (20, 900646), (40, 450323), (401, 44920), (802, 22460), (1123, 16040), (1604, 11230), (2005, 8984), (2246, 8020), (3208, 5615), (4010, 4492)]