21801440

素因数分解:

$2^5\times 5^1\times {\mathrm{89}}^1\times {\mathrm{1531}}^1$

素因数の和:1635

約数の個数: 48

約数和(自身を含む): 52118640

約数和(自身を除く): 30317200

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 89, 160, 178, 356, 445, 712, 890, 1424, 1531, 1780, 2848, 3062, 3560, 6124, 7120, 7655, 12248, 14240, 15310, 24496, 30620, 48992, 61240, 122480, 136259, 244960, 272518, 545036, 681295, 1090072, 1362590, 2180144, 2725180, 4360288, 5450360, 10900720, 21801440]

約数ペア:

[(1, 21801440), (2, 10900720), (4, 5450360), (5, 4360288), (8, 2725180), (10, 2180144), (16, 1362590), (20, 1090072), (32, 681295), (40, 545036), (80, 272518), (89, 244960), (160, 136259), (178, 122480), (356, 61240), (445, 48992), (712, 30620), (890, 24496), (1424, 15310), (1531, 14240), (1780, 12248), (2848, 7655), (3062, 7120), (3560, 6124)]