21208712

素因数分解:

$2^3\times 7^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{643}}^1$

素因数の和:706

約数の個数: 64

約数和(自身を含む): 49459200

約数和(自身を除く): 28250488

約数列:

[1, 2, 4, 7, 8, 14, 19, 28, 31, 38, 56, 62, 76, 124, 133, 152, 217, 248, 266, 434, 532, 589, 643, 868, 1064, 1178, 1286, 1736, 2356, 2572, 4123, 4501, 4712, 5144, 8246, 9002, 12217, 16492, 18004, 19933, 24434, 32984, 36008, 39866, 48868, 79732, 85519, 97736, 139531, 159464, 171038, 279062, 342076, 378727, 558124, 684152, 757454, 1116248, 1514908, 2651089, 3029816, 5302178, 10604356, 21208712]

約数ペア:

[(1, 21208712), (2, 10604356), (4, 5302178), (7, 3029816), (8, 2651089), (14, 1514908), (19, 1116248), (28, 757454), (31, 684152), (38, 558124), (56, 378727), (62, 342076), (76, 279062), (124, 171038), (133, 159464), (152, 139531), (217, 97736), (248, 85519), (266, 79732), (434, 48868), (532, 39866), (589, 36008), (643, 32984), (868, 24434), (1064, 19933), (1178, 18004), (1286, 16492), (1736, 12217), (2356, 9002), (2572, 8246), (4123, 5144), (4501, 4712)]