21401718

素因数分解:

$2^1\times 3^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{53}}^1\times {\mathrm{167}}^1$

素因数の和:269

約数の個数: 64

約数和(自身を含む): 48771072

約数和(自身を除く): 27369354

約数列:

[1, 2, 3, 6, 13, 26, 31, 39, 53, 62, 78, 93, 106, 159, 167, 186, 318, 334, 403, 501, 689, 806, 1002, 1209, 1378, 1643, 2067, 2171, 2418, 3286, 4134, 4342, 4929, 5177, 6513, 8851, 9858, 10354, 13026, 15531, 17702, 21359, 26553, 31062, 42718, 53106, 64077, 67301, 115063, 128154, 134602, 201903, 230126, 274381, 345189, 403806, 548762, 690378, 823143, 1646286, 3566953, 7133906, 10700859, 21401718]

約数ペア:

[(1, 21401718), (2, 10700859), (3, 7133906), (6, 3566953), (13, 1646286), (26, 823143), (31, 690378), (39, 548762), (53, 403806), (62, 345189), (78, 274381), (93, 230126), (106, 201903), (159, 134602), (167, 128154), (186, 115063), (318, 67301), (334, 64077), (403, 53106), (501, 42718), (689, 31062), (806, 26553), (1002, 21359), (1209, 17702), (1378, 15531), (1643, 13026), (2067, 10354), (2171, 9858), (2418, 8851), (3286, 6513), (4134, 5177), (4342, 4929)]