20981790

素因数分解:

$2^1\times 3^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{8039}}^1$

素因数の和:8081

約数の個数: 48

約数和(自身を含む): 56440800

約数和(自身を除く): 35459010

約数列:

[1, 2, 3, 5, 6, 9, 10, 15, 18, 29, 30, 45, 58, 87, 90, 145, 174, 261, 290, 435, 522, 870, 1305, 2610, 8039, 16078, 24117, 40195, 48234, 72351, 80390, 120585, 144702, 233131, 241170, 361755, 466262, 699393, 723510, 1165655, 1398786, 2098179, 2331310, 3496965, 4196358, 6993930, 10490895, 20981790]

約数ペア:

[(1, 20981790), (2, 10490895), (3, 6993930), (5, 4196358), (6, 3496965), (9, 2331310), (10, 2098179), (15, 1398786), (18, 1165655), (29, 723510), (30, 699393), (45, 466262), (58, 361755), (87, 241170), (90, 233131), (145, 144702), (174, 120585), (261, 80390), (290, 72351), (435, 48234), (522, 40195), (870, 24117), (1305, 16078), (2610, 8039)]