21903856

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{79}}^1$

素因数の和:174

約数の個数: 80

約数和(自身を含む): 48885760

約数和(自身を除く): 26981904

約数列:

[1, 2, 4, 8, 13, 16, 26, 31, 43, 52, 62, 79, 86, 104, 124, 158, 172, 208, 248, 316, 344, 403, 496, 559, 632, 688, 806, 1027, 1118, 1264, 1333, 1612, 2054, 2236, 2449, 2666, 3224, 3397, 4108, 4472, 4898, 5332, 6448, 6794, 8216, 8944, 9796, 10664, 13588, 16432, 17329, 19592, 21328, 27176, 31837, 34658, 39184, 44161, 54352, 63674, 69316, 88322, 105307, 127348, 138632, 176644, 210614, 254696, 277264, 353288, 421228, 509392, 706576, 842456, 1368991, 1684912, 2737982, 5475964, 10951928, 21903856]

約数ペア:

[(1, 21903856), (2, 10951928), (4, 5475964), (8, 2737982), (13, 1684912), (16, 1368991), (26, 842456), (31, 706576), (43, 509392), (52, 421228), (62, 353288), (79, 277264), (86, 254696), (104, 210614), (124, 176644), (158, 138632), (172, 127348), (208, 105307), (248, 88322), (316, 69316), (344, 63674), (403, 54352), (496, 44161), (559, 39184), (632, 34658), (688, 31837), (806, 27176), (1027, 21328), (1118, 19592), (1264, 17329), (1333, 16432), (1612, 13588), (2054, 10664), (2236, 9796), (2449, 8944), (2666, 8216), (3224, 6794), (3397, 6448), (4108, 5332), (4472, 4898)]