21528730

素因数分解:

$2^1\times 5^1\times {\mathrm{29}}^1\times {\mathrm{61}}^1\times {\mathrm{1217}}^1$

素因数の和:1314

約数の個数: 32

約数和(自身を含む): 40778640

約数和(自身を除く): 19249910

約数列:

[1, 2, 5, 10, 29, 58, 61, 122, 145, 290, 305, 610, 1217, 1769, 2434, 3538, 6085, 8845, 12170, 17690, 35293, 70586, 74237, 148474, 176465, 352930, 371185, 742370, 2152873, 4305746, 10764365, 21528730]

約数ペア:

[(1, 21528730), (2, 10764365), (5, 4305746), (10, 2152873), (29, 742370), (58, 371185), (61, 352930), (122, 176465), (145, 148474), (290, 74237), (305, 70586), (610, 35293), (1217, 17690), (1769, 12170), (2434, 8845), (3538, 6085)]