21398888

素因数分解:

$2^3\times 7^2\times {\mathrm{79}}^1\times {\mathrm{691}}^1$

素因数の和:790

約数の個数: 48

約数和(自身を含む): 47332800

約数和(自身を除く): 25933912

約数列:

[1, 2, 4, 7, 8, 14, 28, 49, 56, 79, 98, 158, 196, 316, 392, 553, 632, 691, 1106, 1382, 2212, 2764, 3871, 4424, 4837, 5528, 7742, 9674, 15484, 19348, 30968, 33859, 38696, 54589, 67718, 109178, 135436, 218356, 270872, 382123, 436712, 764246, 1528492, 2674861, 3056984, 5349722, 10699444, 21398888]

約数ペア:

[(1, 21398888), (2, 10699444), (4, 5349722), (7, 3056984), (8, 2674861), (14, 1528492), (28, 764246), (49, 436712), (56, 382123), (79, 270872), (98, 218356), (158, 135436), (196, 109178), (316, 67718), (392, 54589), (553, 38696), (632, 33859), (691, 30968), (1106, 19348), (1382, 15484), (2212, 9674), (2764, 7742), (3871, 5528), (4424, 4837)]