21001940

素因数分解:

$2^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{101}}^1\times {\mathrm{281}}^1$

素因数の和:428

約数の個数: 48

約数和(自身を含む): 45907344

約数和(自身を除く): 24905404

約数列:

[1, 2, 4, 5, 10, 20, 37, 74, 101, 148, 185, 202, 281, 370, 404, 505, 562, 740, 1010, 1124, 1405, 2020, 2810, 3737, 5620, 7474, 10397, 14948, 18685, 20794, 28381, 37370, 41588, 51985, 56762, 74740, 103970, 113524, 141905, 207940, 283810, 567620, 1050097, 2100194, 4200388, 5250485, 10500970, 21001940]

約数ペア:

[(1, 21001940), (2, 10500970), (4, 5250485), (5, 4200388), (10, 2100194), (20, 1050097), (37, 567620), (74, 283810), (101, 207940), (148, 141905), (185, 113524), (202, 103970), (281, 74740), (370, 56762), (404, 51985), (505, 41588), (562, 37370), (740, 28381), (1010, 20794), (1124, 18685), (1405, 14948), (2020, 10397), (2810, 7474), (3737, 5620)]