21120440

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{2087}}^1$

素因数の和:2132

約数の個数: 64

約数和(自身を含む): 54120960

約数和(自身を除く): 33000520

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 23, 40, 44, 46, 55, 88, 92, 110, 115, 184, 220, 230, 253, 440, 460, 506, 920, 1012, 1265, 2024, 2087, 2530, 4174, 5060, 8348, 10120, 10435, 16696, 20870, 22957, 41740, 45914, 48001, 83480, 91828, 96002, 114785, 183656, 192004, 229570, 240005, 384008, 459140, 480010, 528011, 918280, 960020, 1056022, 1920040, 2112044, 2640055, 4224088, 5280110, 10560220, 21120440]

約数ペア:

[(1, 21120440), (2, 10560220), (4, 5280110), (5, 4224088), (8, 2640055), (10, 2112044), (11, 1920040), (20, 1056022), (22, 960020), (23, 918280), (40, 528011), (44, 480010), (46, 459140), (55, 384008), (88, 240005), (92, 229570), (110, 192004), (115, 183656), (184, 114785), (220, 96002), (230, 91828), (253, 83480), (440, 48001), (460, 45914), (506, 41740), (920, 22957), (1012, 20870), (1265, 16696), (2024, 10435), (2087, 10120), (2530, 8348), (4174, 5060)]