19986904

素因数分解:

$2^3\times 7^2\times {\mathrm{67}}^1\times {\mathrm{761}}^1$

素因数の和:848

約数の個数: 48

約数和(自身を含む): 44302680

約数和(自身を除く): 24315776

約数列:

[1, 2, 4, 7, 8, 14, 28, 49, 56, 67, 98, 134, 196, 268, 392, 469, 536, 761, 938, 1522, 1876, 3044, 3283, 3752, 5327, 6088, 6566, 10654, 13132, 21308, 26264, 37289, 42616, 50987, 74578, 101974, 149156, 203948, 298312, 356909, 407896, 713818, 1427636, 2498363, 2855272, 4996726, 9993452, 19986904]

約数ペア:

[(1, 19986904), (2, 9993452), (4, 4996726), (7, 2855272), (8, 2498363), (14, 1427636), (28, 713818), (49, 407896), (56, 356909), (67, 298312), (98, 203948), (134, 149156), (196, 101974), (268, 74578), (392, 50987), (469, 42616), (536, 37289), (761, 26264), (938, 21308), (1522, 13132), (1876, 10654), (3044, 6566), (3283, 6088), (3752, 5327)]