21913156

素因数分解:

$2^2\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{71}}^1\times {\mathrm{131}}^1$

素因数の和:256

約数の個数: 48

約数和(自身を含む): 42577920

約数和(自身を除く): 20664764

約数列:

[1, 2, 4, 19, 31, 38, 62, 71, 76, 124, 131, 142, 262, 284, 524, 589, 1178, 1349, 2201, 2356, 2489, 2698, 4061, 4402, 4978, 5396, 8122, 8804, 9301, 9956, 16244, 18602, 37204, 41819, 77159, 83638, 154318, 167276, 176719, 288331, 308636, 353438, 576662, 706876, 1153324, 5478289, 10956578, 21913156]

約数ペア:

[(1, 21913156), (2, 10956578), (4, 5478289), (19, 1153324), (31, 706876), (38, 576662), (62, 353438), (71, 308636), (76, 288331), (124, 176719), (131, 167276), (142, 154318), (262, 83638), (284, 77159), (524, 41819), (589, 37204), (1178, 18602), (1349, 16244), (2201, 9956), (2356, 9301), (2489, 8804), (2698, 8122), (4061, 5396), (4402, 4978)]