8141780

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{9929}}^1$

素因数の和:9979

約数の個数: 24

約数和(自身を含む): 17516520

約数和(自身を除く): 9374740

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 9929, 19858, 39716, 49645, 99290, 198580, 407089, 814178, 1628356, 2035445, 4070890, 8141780]

約数ペア:

[(1, 8141780), (2, 4070890), (4, 2035445), (5, 1628356), (10, 814178), (20, 407089), (41, 198580), (82, 99290), (164, 49645), (205, 39716), (410, 19858), (820, 9929)]