20803880

素因数分解:

$2^3\times 5^1\times {\mathrm{401}}^1\times {\mathrm{1297}}^1$

素因数の和:1709

約数の個数: 32

約数和(自身を含む): 46961640

約数和(自身を除く): 26157760

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 401, 802, 1297, 1604, 2005, 2594, 3208, 4010, 5188, 6485, 8020, 10376, 12970, 16040, 25940, 51880, 520097, 1040194, 2080388, 2600485, 4160776, 5200970, 10401940, 20803880]

約数ペア:

[(1, 20803880), (2, 10401940), (4, 5200970), (5, 4160776), (8, 2600485), (10, 2080388), (20, 1040194), (40, 520097), (401, 51880), (802, 25940), (1297, 16040), (1604, 12970), (2005, 10376), (2594, 8020), (3208, 6485), (4010, 5188)]