21005908

素因数分解:

$2^2\times 7^2\times {\mathrm{11}}^1\times {\mathrm{9743}}^1$

素因数の和:9772

約数の個数: 36

約数和(自身を含む): 46654272

約数和(自身を除く): 25648364

約数列:

[1, 2, 4, 7, 11, 14, 22, 28, 44, 49, 77, 98, 154, 196, 308, 539, 1078, 2156, 9743, 19486, 38972, 68201, 107173, 136402, 214346, 272804, 428692, 477407, 750211, 954814, 1500422, 1909628, 3000844, 5251477, 10502954, 21005908]

約数ペア:

[(1, 21005908), (2, 10502954), (4, 5251477), (7, 3000844), (11, 1909628), (14, 1500422), (22, 954814), (28, 750211), (44, 477407), (49, 428692), (77, 272804), (98, 214346), (154, 136402), (196, 107173), (308, 68201), (539, 38972), (1078, 19486), (2156, 9743)]