21581312

素因数分解:

$2^9\times {\mathrm{61}}^1\times {\mathrm{691}}^1$

素因数の和:770

約数の個数: 40

約数和(自身を含む): 43890792

約数和(自身を除く): 22309480

約数列:

[1, 2, 4, 8, 16, 32, 61, 64, 122, 128, 244, 256, 488, 512, 691, 976, 1382, 1952, 2764, 3904, 5528, 7808, 11056, 15616, 22112, 31232, 42151, 44224, 84302, 88448, 168604, 176896, 337208, 353792, 674416, 1348832, 2697664, 5395328, 10790656, 21581312]

約数ペア:

[(1, 21581312), (2, 10790656), (4, 5395328), (8, 2697664), (16, 1348832), (32, 674416), (61, 353792), (64, 337208), (122, 176896), (128, 168604), (244, 88448), (256, 84302), (488, 44224), (512, 42151), (691, 31232), (976, 22112), (1382, 15616), (1952, 11056), (2764, 7808), (3904, 5528)]