21280636

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{97}}^1\times {\mathrm{4219}}^1$

素因数の和:4333

約数の個数: 24

約数和(自身を含む): 40528880

約数和(自身を除く): 19248244

約数列:

[1, 2, 4, 13, 26, 52, 97, 194, 388, 1261, 2522, 4219, 5044, 8438, 16876, 54847, 109694, 219388, 409243, 818486, 1636972, 5320159, 10640318, 21280636]

約数ペア:

[(1, 21280636), (2, 10640318), (4, 5320159), (13, 1636972), (26, 818486), (52, 409243), (97, 219388), (194, 109694), (388, 54847), (1261, 16876), (2522, 8438), (4219, 5044)]