21650140

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{12163}}^1$

素因数の和:12261

約数の個数: 24

約数和(自身を含む): 45979920

約数和(自身を除く): 24329780

約数列:

[1, 2, 4, 5, 10, 20, 89, 178, 356, 445, 890, 1780, 12163, 24326, 48652, 60815, 121630, 243260, 1082507, 2165014, 4330028, 5412535, 10825070, 21650140]

約数ペア:

[(1, 21650140), (2, 10825070), (4, 5412535), (5, 4330028), (10, 2165014), (20, 1082507), (89, 243260), (178, 121630), (356, 60815), (445, 48652), (890, 24326), (1780, 12163)]