21481904

素因数分解:

$2^4\times {\mathrm{37}}^1\times {\mathrm{131}}^1\times {\mathrm{277}}^1$

素因数の和:453

約数の個数: 40

約数和(自身を含む): 43227888

約数和(自身を除く): 21745984

約数列:

[1, 2, 4, 8, 16, 37, 74, 131, 148, 262, 277, 296, 524, 554, 592, 1048, 1108, 2096, 2216, 4432, 4847, 9694, 10249, 19388, 20498, 36287, 38776, 40996, 72574, 77552, 81992, 145148, 163984, 290296, 580592, 1342619, 2685238, 5370476, 10740952, 21481904]

約数ペア:

[(1, 21481904), (2, 10740952), (4, 5370476), (8, 2685238), (16, 1342619), (37, 580592), (74, 290296), (131, 163984), (148, 145148), (262, 81992), (277, 77552), (296, 72574), (524, 40996), (554, 38776), (592, 36287), (1048, 20498), (1108, 19388), (2096, 10249), (2216, 9694), (4432, 4847)]