21490420

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{21929}}^1$

素因数の和:21952

約数の個数: 36

約数和(自身を含む): 52500420

約数和(自身を除く): 31010000

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 490, 980, 21929, 43858, 87716, 109645, 153503, 219290, 307006, 438580, 614012, 767515, 1074521, 1535030, 2149042, 3070060, 4298084, 5372605, 10745210, 21490420]

約数ペア:

[(1, 21490420), (2, 10745210), (4, 5372605), (5, 4298084), (7, 3070060), (10, 2149042), (14, 1535030), (20, 1074521), (28, 767515), (35, 614012), (49, 438580), (70, 307006), (98, 219290), (140, 153503), (196, 109645), (245, 87716), (490, 43858), (980, 21929)]