21809872

素因数分解:

$2^4\times 7^1\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{277}}^1$

素因数の和:348

約数の個数: 80

約数和(自身を含む): 52397440

約数和(自身を除く): 30587568

約数列:

[1, 2, 4, 7, 8, 14, 16, 19, 28, 37, 38, 56, 74, 76, 112, 133, 148, 152, 259, 266, 277, 296, 304, 518, 532, 554, 592, 703, 1036, 1064, 1108, 1406, 1939, 2072, 2128, 2216, 2812, 3878, 4144, 4432, 4921, 5263, 5624, 7756, 9842, 10249, 10526, 11248, 15512, 19684, 20498, 21052, 31024, 36841, 39368, 40996, 42104, 71743, 73682, 78736, 81992, 84208, 143486, 147364, 163984, 194731, 286972, 294728, 389462, 573944, 589456, 778924, 1147888, 1363117, 1557848, 2726234, 3115696, 5452468, 10904936, 21809872]

約数ペア:

[(1, 21809872), (2, 10904936), (4, 5452468), (7, 3115696), (8, 2726234), (14, 1557848), (16, 1363117), (19, 1147888), (28, 778924), (37, 589456), (38, 573944), (56, 389462), (74, 294728), (76, 286972), (112, 194731), (133, 163984), (148, 147364), (152, 143486), (259, 84208), (266, 81992), (277, 78736), (296, 73682), (304, 71743), (518, 42104), (532, 40996), (554, 39368), (592, 36841), (703, 31024), (1036, 21052), (1064, 20498), (1108, 19684), (1406, 15512), (1939, 11248), (2072, 10526), (2128, 10249), (2216, 9842), (2812, 7756), (3878, 5624), (4144, 5263), (4432, 4921)]