21372939

素因数分解:

$3^2\times 7^1\times {\mathrm{37}}^1\times {\mathrm{53}}^1\times {\mathrm{173}}^1$

素因数の和:276

約数の個数: 48

約数和(自身を含む): 37132992

約数和(自身を除く): 15760053

約数列:

[1, 3, 7, 9, 21, 37, 53, 63, 111, 159, 173, 259, 333, 371, 477, 519, 777, 1113, 1211, 1557, 1961, 2331, 3339, 3633, 5883, 6401, 9169, 10899, 13727, 17649, 19203, 27507, 41181, 44807, 57609, 64183, 82521, 123543, 134421, 192549, 339253, 403263, 577647, 1017759, 2374771, 3053277, 7124313, 21372939]

約数ペア:

[(1, 21372939), (3, 7124313), (7, 3053277), (9, 2374771), (21, 1017759), (37, 577647), (53, 403263), (63, 339253), (111, 192549), (159, 134421), (173, 123543), (259, 82521), (333, 64183), (371, 57609), (477, 44807), (519, 41181), (777, 27507), (1113, 19203), (1211, 17649), (1557, 13727), (1961, 10899), (2331, 9169), (3339, 6401), (3633, 5883)]