128538760

素因数分解:

$2^3\times 5^1\times 7^2\times {\mathrm{65581}}^1$

素因数の和:65606

約数の個数: 48

約数和(自身を含む): 336435660

約数和(自身を除く): 207896900

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 49, 56, 70, 98, 140, 196, 245, 280, 392, 490, 980, 1960, 65581, 131162, 262324, 327905, 459067, 524648, 655810, 918134, 1311620, 1836268, 2295335, 2623240, 3213469, 3672536, 4590670, 6426938, 9181340, 12853876, 16067345, 18362680, 25707752, 32134690, 64269380, 128538760]

約数ペア:

[(1, 128538760), (2, 64269380), (4, 32134690), (5, 25707752), (7, 18362680), (8, 16067345), (10, 12853876), (14, 9181340), (20, 6426938), (28, 4590670), (35, 3672536), (40, 3213469), (49, 2623240), (56, 2295335), (70, 1836268), (98, 1311620), (140, 918134), (196, 655810), (245, 524648), (280, 459067), (392, 327905), (490, 262324), (980, 131162), (1960, 65581)]