21990801

素因数分解:

$3^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{25541}}^1$

素因数の和:25592

約数の個数: 16

約数和(自身を含む): 34328448

約数和(自身を除く): 12337647

約数列:

[1, 3, 7, 21, 41, 123, 287, 861, 25541, 76623, 178787, 536361, 1047181, 3141543, 7330267, 21990801]

約数ペア:

[(1, 21990801), (3, 7330267), (7, 3141543), (21, 1047181), (41, 536361), (123, 178787), (287, 76623), (861, 25541)]