21065440

素因数分解:

$2^5\times 5^1\times {\mathrm{11}}^1\times {\mathrm{11969}}^1$

素因数の和:11995

約数の個数: 48

約数和(自身を含む): 54295920

約数和(自身を除く): 33230480

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 32, 40, 44, 55, 80, 88, 110, 160, 176, 220, 352, 440, 880, 1760, 11969, 23938, 47876, 59845, 95752, 119690, 131659, 191504, 239380, 263318, 383008, 478760, 526636, 658295, 957520, 1053272, 1316590, 1915040, 2106544, 2633180, 4213088, 5266360, 10532720, 21065440]

約数ペア:

[(1, 21065440), (2, 10532720), (4, 5266360), (5, 4213088), (8, 2633180), (10, 2106544), (11, 1915040), (16, 1316590), (20, 1053272), (22, 957520), (32, 658295), (40, 526636), (44, 478760), (55, 383008), (80, 263318), (88, 239380), (110, 191504), (160, 131659), (176, 119690), (220, 95752), (352, 59845), (440, 47876), (880, 23938), (1760, 11969)]