215715940

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{491}}^1\times {\mathrm{1997}}^1$

素因数の和:2508

約数の個数: 48

約数和(自身を含む): 495440064

約数和(自身を除く): 279724124

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 491, 982, 1964, 1997, 2455, 3994, 4910, 5401, 7988, 9820, 9985, 10802, 19970, 21604, 21967, 27005, 39940, 43934, 54010, 87868, 108020, 109835, 219670, 439340, 980527, 1961054, 3922108, 4902635, 9805270, 10785797, 19610540, 21571594, 43143188, 53928985, 107857970, 215715940]

約数ペア:

[(1, 215715940), (2, 107857970), (4, 53928985), (5, 43143188), (10, 21571594), (11, 19610540), (20, 10785797), (22, 9805270), (44, 4902635), (55, 3922108), (110, 1961054), (220, 980527), (491, 439340), (982, 219670), (1964, 109835), (1997, 108020), (2455, 87868), (3994, 54010), (4910, 43934), (5401, 39940), (7988, 27005), (9820, 21967), (9985, 21604), (10802, 19970)]