21111992

素因数分解:

$2^3\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{71}}^1\times {\mathrm{109}}^1$

素因数の和:228

約数の個数: 64

約数和(自身を含む): 45619200

約数和(自身を除く): 24507208

約数列:

[1, 2, 4, 8, 11, 22, 31, 44, 62, 71, 88, 109, 124, 142, 218, 248, 284, 341, 436, 568, 682, 781, 872, 1199, 1364, 1562, 2201, 2398, 2728, 3124, 3379, 4402, 4796, 6248, 6758, 7739, 8804, 9592, 13516, 15478, 17608, 24211, 27032, 30956, 37169, 48422, 61912, 74338, 85129, 96844, 148676, 170258, 193688, 239909, 297352, 340516, 479818, 681032, 959636, 1919272, 2638999, 5277998, 10555996, 21111992]

約数ペア:

[(1, 21111992), (2, 10555996), (4, 5277998), (8, 2638999), (11, 1919272), (22, 959636), (31, 681032), (44, 479818), (62, 340516), (71, 297352), (88, 239909), (109, 193688), (124, 170258), (142, 148676), (218, 96844), (248, 85129), (284, 74338), (341, 61912), (436, 48422), (568, 37169), (682, 30956), (781, 27032), (872, 24211), (1199, 17608), (1364, 15478), (1562, 13516), (2201, 9592), (2398, 8804), (2728, 7739), (3124, 6758), (3379, 6248), (4402, 4796)]