21227265

素因数分解:

$3^5\times 5^1\times {\mathrm{17471}}^1$

素因数の和:17491

約数の個数: 24

約数和(自身を含む): 38158848

約数和(自身を除く): 16931583

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 243, 405, 1215, 17471, 52413, 87355, 157239, 262065, 471717, 786195, 1415151, 2358585, 4245453, 7075755, 21227265]

約数ペア:

[(1, 21227265), (3, 7075755), (5, 4245453), (9, 2358585), (15, 1415151), (27, 786195), (45, 471717), (81, 262065), (135, 157239), (243, 87355), (405, 52413), (1215, 17471)]