21185788

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{6679}}^1$

素因数の和:6757

約数の個数: 24

約数和(自身を含む): 40587680

約数和(自身を除く): 19401892

約数列:

[1, 2, 4, 13, 26, 52, 61, 122, 244, 793, 1586, 3172, 6679, 13358, 26716, 86827, 173654, 347308, 407419, 814838, 1629676, 5296447, 10592894, 21185788]

約数ペア:

[(1, 21185788), (2, 10592894), (4, 5296447), (13, 1629676), (26, 814838), (52, 407419), (61, 347308), (122, 173654), (244, 86827), (793, 26716), (1586, 13358), (3172, 6679)]