21906868

素因数分解:

$2^2\times {\mathrm{97}}^1\times {\mathrm{131}}^1\times {\mathrm{431}}^1$

素因数の和:663

約数の個数: 24

約数和(自身を含む): 39118464

約数和(自身を除く): 17211596

約数列:

[1, 2, 4, 97, 131, 194, 262, 388, 431, 524, 862, 1724, 12707, 25414, 41807, 50828, 56461, 83614, 112922, 167228, 225844, 5476717, 10953434, 21906868]

約数ペア:

[(1, 21906868), (2, 10953434), (4, 5476717), (97, 225844), (131, 167228), (194, 112922), (262, 83614), (388, 56461), (431, 50828), (524, 41807), (862, 25414), (1724, 12707)]