21780120100

素因数分解:

$2^2\times 5^2\times {\mathrm{223}}^1\times {\mathrm{827}}^1\times {\mathrm{1181}}^1$

素因数の和:2245

約数の個数: 72

約数和(自身を含む): 47572455168

約数和(自身を除く): 25792335068

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 223, 446, 827, 892, 1115, 1181, 1654, 2230, 2362, 3308, 4135, 4460, 4724, 5575, 5905, 8270, 11150, 11810, 16540, 20675, 22300, 23620, 29525, 41350, 59050, 82700, 118100, 184421, 263363, 368842, 526726, 737684, 922105, 976687, 1053452, 1316815, 1844210, 1953374, 2633630, 3688420, 3906748, 4610525, 4883435, 5267260, 6584075, 9221050, 9766870, 13168150, 18442100, 19533740, 24417175, 26336300, 48834350, 97668700, 217801201, 435602402, 871204804, 1089006005, 2178012010, 4356024020, 5445030025, 10890060050, 21780120100]

約数ペア:

[(1, 21780120100), (2, 10890060050), (4, 5445030025), (5, 4356024020), (10, 2178012010), (20, 1089006005), (25, 871204804), (50, 435602402), (100, 217801201), (223, 97668700), (446, 48834350), (827, 26336300), (892, 24417175), (1115, 19533740), (1181, 18442100), (1654, 13168150), (2230, 9766870), (2362, 9221050), (3308, 6584075), (4135, 5267260), (4460, 4883435), (4724, 4610525), (5575, 3906748), (5905, 3688420), (8270, 2633630), (11150, 1953374), (11810, 1844210), (16540, 1316815), (20675, 1053452), (22300, 976687), (23620, 922105), (29525, 737684), (41350, 526726), (59050, 368842), (82700, 263363), (118100, 184421)]