20213936

素因数分解:

$2^4\times {\mathrm{61}}^1\times {\mathrm{139}}^1\times {\mathrm{149}}^1$

素因数の和:357

約数の個数: 40

約数和(自身を含む): 40362000

約数和(自身を除く): 20148064

約数列:

[1, 2, 4, 8, 16, 61, 122, 139, 149, 244, 278, 298, 488, 556, 596, 976, 1112, 1192, 2224, 2384, 8479, 9089, 16958, 18178, 20711, 33916, 36356, 41422, 67832, 72712, 82844, 135664, 145424, 165688, 331376, 1263371, 2526742, 5053484, 10106968, 20213936]

約数ペア:

[(1, 20213936), (2, 10106968), (4, 5053484), (8, 2526742), (16, 1263371), (61, 331376), (122, 165688), (139, 145424), (149, 135664), (244, 82844), (278, 72712), (298, 67832), (488, 41422), (556, 36356), (596, 33916), (976, 20711), (1112, 18178), (1192, 16958), (2224, 9089), (2384, 8479)]