20188400

素因数分解:

$2^4\times 5^2\times {\mathrm{41}}^1\times {\mathrm{1231}}^1$

素因数の和:1290

約数の個数: 60

約数和(自身を含む): 49725984

約数和(自身を除く): 29537584

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 41, 50, 80, 82, 100, 164, 200, 205, 328, 400, 410, 656, 820, 1025, 1231, 1640, 2050, 2462, 3280, 4100, 4924, 6155, 8200, 9848, 12310, 16400, 19696, 24620, 30775, 49240, 50471, 61550, 98480, 100942, 123100, 201884, 246200, 252355, 403768, 492400, 504710, 807536, 1009420, 1261775, 2018840, 2523550, 4037680, 5047100, 10094200, 20188400]

約数ペア:

[(1, 20188400), (2, 10094200), (4, 5047100), (5, 4037680), (8, 2523550), (10, 2018840), (16, 1261775), (20, 1009420), (25, 807536), (40, 504710), (41, 492400), (50, 403768), (80, 252355), (82, 246200), (100, 201884), (164, 123100), (200, 100942), (205, 98480), (328, 61550), (400, 50471), (410, 49240), (656, 30775), (820, 24620), (1025, 19696), (1231, 16400), (1640, 12310), (2050, 9848), (2462, 8200), (3280, 6155), (4100, 4924)]