397978760

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^2\times {\mathrm{5381}}^1$

素因数の和:5478

約数の個数: 48

約数和(自身を含む): 916931340

約数和(自身を除く): 518952580

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 344, 430, 860, 1720, 1849, 3698, 5381, 7396, 9245, 10762, 14792, 18490, 21524, 26905, 36980, 43048, 53810, 73960, 107620, 215240, 231383, 462766, 925532, 1156915, 1851064, 2313830, 4627660, 9255320, 9949469, 19898938, 39797876, 49747345, 79595752, 99494690, 198989380, 397978760]

約数ペア:

[(1, 397978760), (2, 198989380), (4, 99494690), (5, 79595752), (8, 49747345), (10, 39797876), (20, 19898938), (40, 9949469), (43, 9255320), (86, 4627660), (172, 2313830), (215, 1851064), (344, 1156915), (430, 925532), (860, 462766), (1720, 231383), (1849, 215240), (3698, 107620), (5381, 73960), (7396, 53810), (9245, 43048), (10762, 36980), (14792, 26905), (18490, 21524)]