21978628

素因数分解:

$2^2\times 7^1\times {\mathrm{31}}^1\times {\mathrm{25321}}^1$

素因数の和:25363

約数の個数: 24

約数和(自身を含む): 45377024

約数和(自身を除く): 23398396

約数列:

[1, 2, 4, 7, 14, 28, 31, 62, 124, 217, 434, 868, 25321, 50642, 101284, 177247, 354494, 708988, 784951, 1569902, 3139804, 5494657, 10989314, 21978628]

約数ペア:

[(1, 21978628), (2, 10989314), (4, 5494657), (7, 3139804), (14, 1569902), (28, 784951), (31, 708988), (62, 354494), (124, 177247), (217, 101284), (434, 50642), (868, 25321)]