21149380

素因数分解:

$2^2\times 5^1\times 7^3\times {\mathrm{3083}}^1$

素因数の和:3113

約数の個数: 48

約数和(自身を含む): 51811200

約数和(自身を除く): 30661820

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 343, 490, 686, 980, 1372, 1715, 3083, 3430, 6166, 6860, 12332, 15415, 21581, 30830, 43162, 61660, 86324, 107905, 151067, 215810, 302134, 431620, 604268, 755335, 1057469, 1510670, 2114938, 3021340, 4229876, 5287345, 10574690, 21149380]

約数ペア:

[(1, 21149380), (2, 10574690), (4, 5287345), (5, 4229876), (7, 3021340), (10, 2114938), (14, 1510670), (20, 1057469), (28, 755335), (35, 604268), (49, 431620), (70, 302134), (98, 215810), (140, 151067), (196, 107905), (245, 86324), (343, 61660), (490, 43162), (686, 30830), (980, 21581), (1372, 15415), (1715, 12332), (3083, 6860), (3430, 6166)]