21288520

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{48383}}^1$

素因数の和:48405

約数の個数: 32

約数和(自身を含む): 52254720

約数和(自身を除く): 30966200

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 440, 48383, 96766, 193532, 241915, 387064, 483830, 532213, 967660, 1064426, 1935320, 2128852, 2661065, 4257704, 5322130, 10644260, 21288520]

約数ペア:

[(1, 21288520), (2, 10644260), (4, 5322130), (5, 4257704), (8, 2661065), (10, 2128852), (11, 1935320), (20, 1064426), (22, 967660), (40, 532213), (44, 483830), (55, 387064), (88, 241915), (110, 193532), (220, 96766), (440, 48383)]