21218704

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{102013}}^1$

素因数の和:102034

約数の個数: 20

約数和(自身を含む): 44274076

約数和(自身を除く): 23055372

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 102013, 204026, 408052, 816104, 1326169, 1632208, 2652338, 5304676, 10609352, 21218704]

約数ペア:

[(1, 21218704), (2, 10609352), (4, 5304676), (8, 2652338), (13, 1632208), (16, 1326169), (26, 816104), (52, 408052), (104, 204026), (208, 102013)]