18978586

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{151}}^1\times {\mathrm{197}}^1$

素因数の和:390

約数の個数: 32

約数和(自身を含む): 32503680

約数和(自身を除く): 13525094

約数列:

[1, 2, 11, 22, 29, 58, 151, 197, 302, 319, 394, 638, 1661, 2167, 3322, 4334, 4379, 5713, 8758, 11426, 29747, 48169, 59494, 62843, 96338, 125686, 327217, 654434, 862663, 1725326, 9489293, 18978586]

約数ペア:

[(1, 18978586), (2, 9489293), (11, 1725326), (22, 862663), (29, 654434), (58, 327217), (151, 125686), (197, 96338), (302, 62843), (319, 59494), (394, 48169), (638, 29747), (1661, 11426), (2167, 8758), (3322, 5713), (4334, 4379)]