21381052

素因数分解:

$2^2\times 7^2\times {\mathrm{11}}^1\times {\mathrm{47}}^1\times {\mathrm{211}}^1$

素因数の和:287

約数の個数: 72

約数和(自身を含む): 48722688

約数和(自身を除く): 27341636

約数列:

[1, 2, 4, 7, 11, 14, 22, 28, 44, 47, 49, 77, 94, 98, 154, 188, 196, 211, 308, 329, 422, 517, 539, 658, 844, 1034, 1078, 1316, 1477, 2068, 2156, 2303, 2321, 2954, 3619, 4606, 4642, 5908, 7238, 9212, 9284, 9917, 10339, 14476, 16247, 19834, 20678, 25333, 32494, 39668, 41356, 50666, 64988, 69419, 101332, 109087, 113729, 138838, 218174, 227458, 277676, 436348, 454916, 485933, 763609, 971866, 1527218, 1943732, 3054436, 5345263, 10690526, 21381052]

約数ペア:

[(1, 21381052), (2, 10690526), (4, 5345263), (7, 3054436), (11, 1943732), (14, 1527218), (22, 971866), (28, 763609), (44, 485933), (47, 454916), (49, 436348), (77, 277676), (94, 227458), (98, 218174), (154, 138838), (188, 113729), (196, 109087), (211, 101332), (308, 69419), (329, 64988), (422, 50666), (517, 41356), (539, 39668), (658, 32494), (844, 25333), (1034, 20678), (1078, 19834), (1316, 16247), (1477, 14476), (2068, 10339), (2156, 9917), (2303, 9284), (2321, 9212), (2954, 7238), (3619, 5908), (4606, 4642)]