21721040

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{24683}}^1$

素因数の和:24707

約数の個数: 40

約数和(自身を含む): 55094688

約数和(自身を除く): 33373648

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 80, 88, 110, 176, 220, 440, 880, 24683, 49366, 98732, 123415, 197464, 246830, 271513, 394928, 493660, 543026, 987320, 1086052, 1357565, 1974640, 2172104, 2715130, 4344208, 5430260, 10860520, 21721040]

約数ペア:

[(1, 21721040), (2, 10860520), (4, 5430260), (5, 4344208), (8, 2715130), (10, 2172104), (11, 1974640), (16, 1357565), (20, 1086052), (22, 987320), (40, 543026), (44, 493660), (55, 394928), (80, 271513), (88, 246830), (110, 197464), (176, 123415), (220, 98732), (440, 49366), (880, 24683)]