21257754

素因数分解:

$2^1\times 3^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{563}}^1$

素因数の和:635

約数の個数: 64

約数和(自身を含む): 51978240

約数和(自身を除く): 30720486

約数列:

[1, 2, 3, 6, 7, 14, 21, 29, 31, 42, 58, 62, 87, 93, 174, 186, 203, 217, 406, 434, 563, 609, 651, 899, 1126, 1218, 1302, 1689, 1798, 2697, 3378, 3941, 5394, 6293, 7882, 11823, 12586, 16327, 17453, 18879, 23646, 32654, 34906, 37758, 48981, 52359, 97962, 104718, 114289, 122171, 228578, 244342, 342867, 366513, 506137, 685734, 733026, 1012274, 1518411, 3036822, 3542959, 7085918, 10628877, 21257754]

約数ペア:

[(1, 21257754), (2, 10628877), (3, 7085918), (6, 3542959), (7, 3036822), (14, 1518411), (21, 1012274), (29, 733026), (31, 685734), (42, 506137), (58, 366513), (62, 342867), (87, 244342), (93, 228578), (174, 122171), (186, 114289), (203, 104718), (217, 97962), (406, 52359), (434, 48981), (563, 37758), (609, 34906), (651, 32654), (899, 23646), (1126, 18879), (1218, 17453), (1302, 16327), (1689, 12586), (1798, 11823), (2697, 7882), (3378, 6293), (3941, 5394)]