398392520

素因数分解:

$2^3\times 5^1\times {\mathrm{53}}^1\times {\mathrm{187921}}^1$

素因数の和:187985

約数の個数: 32

約数和(自身を含む): 913300920

約数和(自身を除く): 514908400

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 53, 106, 212, 265, 424, 530, 1060, 2120, 187921, 375842, 751684, 939605, 1503368, 1879210, 3758420, 7516840, 9959813, 19919626, 39839252, 49799065, 79678504, 99598130, 199196260, 398392520]

約数ペア:

[(1, 398392520), (2, 199196260), (4, 99598130), (5, 79678504), (8, 49799065), (10, 39839252), (20, 19919626), (40, 9959813), (53, 7516840), (106, 3758420), (212, 1879210), (265, 1503368), (424, 939605), (530, 751684), (1060, 375842), (2120, 187921)]