21113840

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{23993}}^1$

素因数の和:24017

約数の個数: 40

約数和(自身を含む): 53554608

約数和(自身を除く): 32440768

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 80, 88, 110, 176, 220, 440, 880, 23993, 47986, 95972, 119965, 191944, 239930, 263923, 383888, 479860, 527846, 959720, 1055692, 1319615, 1919440, 2111384, 2639230, 4222768, 5278460, 10556920, 21113840]

約数ペア:

[(1, 21113840), (2, 10556920), (4, 5278460), (5, 4222768), (8, 2639230), (10, 2111384), (11, 1919440), (16, 1319615), (20, 1055692), (22, 959720), (40, 527846), (44, 479860), (55, 383888), (80, 263923), (88, 239930), (110, 191944), (176, 119965), (220, 95972), (440, 47986), (880, 23993)]