21996940

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{3343}}^1$

素因数の和:3406

約数の個数: 48

約数和(自身を含む): 53932032

約数和(自身を除く): 31935092

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 47, 70, 94, 140, 188, 235, 329, 470, 658, 940, 1316, 1645, 3290, 3343, 6580, 6686, 13372, 16715, 23401, 33430, 46802, 66860, 93604, 117005, 157121, 234010, 314242, 468020, 628484, 785605, 1099847, 1571210, 2199694, 3142420, 4399388, 5499235, 10998470, 21996940]

約数ペア:

[(1, 21996940), (2, 10998470), (4, 5499235), (5, 4399388), (7, 3142420), (10, 2199694), (14, 1571210), (20, 1099847), (28, 785605), (35, 628484), (47, 468020), (70, 314242), (94, 234010), (140, 157121), (188, 117005), (235, 93604), (329, 66860), (470, 46802), (658, 33430), (940, 23401), (1316, 16715), (1645, 13372), (3290, 6686), (3343, 6580)]