21000355012

素因数分解:

$2^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{277}}^1\times {\mathrm{208279}}^1$

素因数の和:208580

約数の個数: 48

約数和(自身を含む): 45395042560

約数和(自身を除く): 24394687548

約数列:

[1, 2, 4, 7, 13, 14, 26, 28, 52, 91, 182, 277, 364, 554, 1108, 1939, 3601, 3878, 7202, 7756, 14404, 25207, 50414, 100828, 208279, 416558, 833116, 1457953, 2707627, 2915906, 5415254, 5831812, 10830508, 18953389, 37906778, 57693283, 75813556, 115386566, 230773132, 403852981, 750012679, 807705962, 1500025358, 1615411924, 3000050716, 5250088753, 10500177506, 21000355012]

約数ペア:

[(1, 21000355012), (2, 10500177506), (4, 5250088753), (7, 3000050716), (13, 1615411924), (14, 1500025358), (26, 807705962), (28, 750012679), (52, 403852981), (91, 230773132), (182, 115386566), (277, 75813556), (364, 57693283), (554, 37906778), (1108, 18953389), (1939, 10830508), (3601, 5831812), (3878, 5415254), (7202, 2915906), (7756, 2707627), (14404, 1457953), (25207, 833116), (50414, 416558), (100828, 208279)]