20040880

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{8081}}^1$

素因数の和:8125

約数の個数: 40

約数和(自身を含む): 48104064

約数和(自身を除く): 28063184

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 62, 80, 124, 155, 248, 310, 496, 620, 1240, 2480, 8081, 16162, 32324, 40405, 64648, 80810, 129296, 161620, 250511, 323240, 501022, 646480, 1002044, 1252555, 2004088, 2505110, 4008176, 5010220, 10020440, 20040880]

約数ペア:

[(1, 20040880), (2, 10020440), (4, 5010220), (5, 4008176), (8, 2505110), (10, 2004088), (16, 1252555), (20, 1002044), (31, 646480), (40, 501022), (62, 323240), (80, 250511), (124, 161620), (155, 129296), (248, 80810), (310, 64648), (496, 40405), (620, 32324), (1240, 16162), (2480, 8081)]