21192941

素因数分解:

$7^3\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{137}}^1$

素因数の和:210

約数の個数: 32

約数和(自身を含む): 27820800

約数和(自身を除く): 6627859

約数列:

[1, 7, 11, 41, 49, 77, 137, 287, 343, 451, 539, 959, 1507, 2009, 3157, 3773, 5617, 6713, 10549, 14063, 22099, 39319, 46991, 61787, 73843, 154693, 275233, 432509, 516901, 1926631, 3027563, 21192941]

約数ペア:

[(1, 21192941), (7, 3027563), (11, 1926631), (41, 516901), (49, 432509), (77, 275233), (137, 154693), (287, 73843), (343, 61787), (451, 46991), (539, 39319), (959, 22099), (1507, 14063), (2009, 10549), (3157, 6713), (3773, 5617)]