20495900

素因数分解:

$2^2\times 5^2\times {\mathrm{41}}^1\times {\mathrm{4999}}^1$

素因数の和:5054

約数の個数: 36

約数和(自身を含む): 45570000

約数和(自身を除く): 25074100

約数列:

[1, 2, 4, 5, 10, 20, 25, 41, 50, 82, 100, 164, 205, 410, 820, 1025, 2050, 4100, 4999, 9998, 19996, 24995, 49990, 99980, 124975, 204959, 249950, 409918, 499900, 819836, 1024795, 2049590, 4099180, 5123975, 10247950, 20495900]

約数ペア:

[(1, 20495900), (2, 10247950), (4, 5123975), (5, 4099180), (10, 2049590), (20, 1024795), (25, 819836), (41, 499900), (50, 409918), (82, 249950), (100, 204959), (164, 124975), (205, 99980), (410, 49990), (820, 24995), (1025, 19996), (2050, 9998), (4100, 4999)]