21112868

素因数分解:

$2^2\times 7^1\times {\mathrm{41}}^1\times {\mathrm{53}}^1\times {\mathrm{347}}^1$

素因数の和:452

約数の個数: 48

約数和(自身を含む): 44198784

約数和(自身を除く): 23085916

約数列:

[1, 2, 4, 7, 14, 28, 41, 53, 82, 106, 164, 212, 287, 347, 371, 574, 694, 742, 1148, 1388, 1484, 2173, 2429, 4346, 4858, 8692, 9716, 14227, 15211, 18391, 28454, 30422, 36782, 56908, 60844, 73564, 99589, 128737, 199178, 257474, 398356, 514948, 754031, 1508062, 3016124, 5278217, 10556434, 21112868]

約数ペア:

[(1, 21112868), (2, 10556434), (4, 5278217), (7, 3016124), (14, 1508062), (28, 754031), (41, 514948), (53, 398356), (82, 257474), (106, 199178), (164, 128737), (212, 99589), (287, 73564), (347, 60844), (371, 56908), (574, 36782), (694, 30422), (742, 28454), (1148, 18391), (1388, 15211), (1484, 14227), (2173, 9716), (2429, 8692), (4346, 4858)]