21397844

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{157}}^1\times {\mathrm{2621}}^1$

素因数の和:2795

約数の個数: 24

約数和(自身を含む): 40599048

約数和(自身を除く): 19201204

約数列:

[1, 2, 4, 13, 26, 52, 157, 314, 628, 2041, 2621, 4082, 5242, 8164, 10484, 34073, 68146, 136292, 411497, 822994, 1645988, 5349461, 10698922, 21397844]

約数ペア:

[(1, 21397844), (2, 10698922), (4, 5349461), (13, 1645988), (26, 822994), (52, 411497), (157, 136292), (314, 68146), (628, 34073), (2041, 10484), (2621, 8164), (4082, 5242)]