21856400

素因数分解:

$2^4\times 5^2\times {\mathrm{101}}^1\times {\mathrm{541}}^1$

素因数の和:660

約数の個数: 60

約数和(自身を含む): 53127924

約数和(自身を除く): 31271524

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 101, 200, 202, 400, 404, 505, 541, 808, 1010, 1082, 1616, 2020, 2164, 2525, 2705, 4040, 4328, 5050, 5410, 8080, 8656, 10100, 10820, 13525, 20200, 21640, 27050, 40400, 43280, 54100, 54641, 108200, 109282, 216400, 218564, 273205, 437128, 546410, 874256, 1092820, 1366025, 2185640, 2732050, 4371280, 5464100, 10928200, 21856400]

約数ペア:

[(1, 21856400), (2, 10928200), (4, 5464100), (5, 4371280), (8, 2732050), (10, 2185640), (16, 1366025), (20, 1092820), (25, 874256), (40, 546410), (50, 437128), (80, 273205), (100, 218564), (101, 216400), (200, 109282), (202, 108200), (400, 54641), (404, 54100), (505, 43280), (541, 40400), (808, 27050), (1010, 21640), (1082, 20200), (1616, 13525), (2020, 10820), (2164, 10100), (2525, 8656), (2705, 8080), (4040, 5410), (4328, 5050)]