21271292

素因数分解:

$2^2\times 7^2\times {\mathrm{41}}^1\times {\mathrm{2647}}^1$

素因数の和:2706

約数の個数: 36

約数和(自身を含む): 44375184

約数和(自身を除く): 23103892

約数列:

[1, 2, 4, 7, 14, 28, 41, 49, 82, 98, 164, 196, 287, 574, 1148, 2009, 2647, 4018, 5294, 8036, 10588, 18529, 37058, 74116, 108527, 129703, 217054, 259406, 434108, 518812, 759689, 1519378, 3038756, 5317823, 10635646, 21271292]

約数ペア:

[(1, 21271292), (2, 10635646), (4, 5317823), (7, 3038756), (14, 1519378), (28, 759689), (41, 518812), (49, 434108), (82, 259406), (98, 217054), (164, 129703), (196, 108527), (287, 74116), (574, 37058), (1148, 18529), (2009, 10588), (2647, 8036), (4018, 5294)]