21372460

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{12007}}^1$

素因数の和:12105

約数の個数: 24

約数和(自身を含む): 45390240

約数和(自身を除く): 24017780

約数列:

[1, 2, 4, 5, 10, 20, 89, 178, 356, 445, 890, 1780, 12007, 24014, 48028, 60035, 120070, 240140, 1068623, 2137246, 4274492, 5343115, 10686230, 21372460]

約数ペア:

[(1, 21372460), (2, 10686230), (4, 5343115), (5, 4274492), (10, 2137246), (20, 1068623), (89, 240140), (178, 120070), (356, 60035), (445, 48028), (890, 24014), (1780, 12007)]