21089012

素因数分解:

$2^2\times 7^3\times {\mathrm{19}}^1\times {\mathrm{809}}^1$

素因数の和:853

約数の個数: 48

約数和(自身を含む): 45360000

約数和(自身を除く): 24270988

約数列:

[1, 2, 4, 7, 14, 19, 28, 38, 49, 76, 98, 133, 196, 266, 343, 532, 686, 809, 931, 1372, 1618, 1862, 3236, 3724, 5663, 6517, 11326, 13034, 15371, 22652, 26068, 30742, 39641, 61484, 79282, 107597, 158564, 215194, 277487, 430388, 554974, 753179, 1109948, 1506358, 3012716, 5272253, 10544506, 21089012]

約数ペア:

[(1, 21089012), (2, 10544506), (4, 5272253), (7, 3012716), (14, 1506358), (19, 1109948), (28, 753179), (38, 554974), (49, 430388), (76, 277487), (98, 215194), (133, 158564), (196, 107597), (266, 79282), (343, 61484), (532, 39641), (686, 30742), (809, 26068), (931, 22652), (1372, 15371), (1618, 13034), (1862, 11326), (3236, 6517), (3724, 5663)]