21291172

素因数分解:

$2^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{1291}}^1$

素因数の和:1352

約数の個数: 48

約数和(自身を含む): 46305280

約数和(自身を除く): 25014108

約数列:

[1, 2, 4, 7, 14, 19, 28, 31, 38, 62, 76, 124, 133, 217, 266, 434, 532, 589, 868, 1178, 1291, 2356, 2582, 4123, 5164, 8246, 9037, 16492, 18074, 24529, 36148, 40021, 49058, 80042, 98116, 160084, 171703, 280147, 343406, 560294, 686812, 760399, 1120588, 1520798, 3041596, 5322793, 10645586, 21291172]

約数ペア:

[(1, 21291172), (2, 10645586), (4, 5322793), (7, 3041596), (14, 1520798), (19, 1120588), (28, 760399), (31, 686812), (38, 560294), (62, 343406), (76, 280147), (124, 171703), (133, 160084), (217, 98116), (266, 80042), (434, 49058), (532, 40021), (589, 36148), (868, 24529), (1178, 18074), (1291, 16492), (2356, 9037), (2582, 8246), (4123, 5164)]