21490976

素因数分解:

$2^5\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{2719}}^1$

素因数の和:2761

約数の個数: 48

約数和(自身を含む): 47980800

約数和(自身を除く): 26489824

約数列:

[1, 2, 4, 8, 13, 16, 19, 26, 32, 38, 52, 76, 104, 152, 208, 247, 304, 416, 494, 608, 988, 1976, 2719, 3952, 5438, 7904, 10876, 21752, 35347, 43504, 51661, 70694, 87008, 103322, 141388, 206644, 282776, 413288, 565552, 671593, 826576, 1131104, 1343186, 1653152, 2686372, 5372744, 10745488, 21490976]

約数ペア:

[(1, 21490976), (2, 10745488), (4, 5372744), (8, 2686372), (13, 1653152), (16, 1343186), (19, 1131104), (26, 826576), (32, 671593), (38, 565552), (52, 413288), (76, 282776), (104, 206644), (152, 141388), (208, 103322), (247, 87008), (304, 70694), (416, 51661), (494, 43504), (608, 35347), (988, 21752), (1976, 10876), (2719, 7904), (3952, 5438)]