21448640

素因数分解:

$2^6\times 5^1\times {\mathrm{97}}^1\times {\mathrm{691}}^1$

素因数の和:805

約数の個数: 56

約数和(自身を含む): 51675792

約数和(自身を除く): 30227152

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 97, 160, 194, 320, 388, 485, 691, 776, 970, 1382, 1552, 1940, 2764, 3104, 3455, 3880, 5528, 6208, 6910, 7760, 11056, 13820, 15520, 22112, 27640, 31040, 44224, 55280, 67027, 110560, 134054, 221120, 268108, 335135, 536216, 670270, 1072432, 1340540, 2144864, 2681080, 4289728, 5362160, 10724320, 21448640]

約数ペア:

[(1, 21448640), (2, 10724320), (4, 5362160), (5, 4289728), (8, 2681080), (10, 2144864), (16, 1340540), (20, 1072432), (32, 670270), (40, 536216), (64, 335135), (80, 268108), (97, 221120), (160, 134054), (194, 110560), (320, 67027), (388, 55280), (485, 44224), (691, 31040), (776, 27640), (970, 22112), (1382, 15520), (1552, 13820), (1940, 11056), (2764, 7760), (3104, 6910), (3455, 6208), (3880, 5528)]