20189455

素因数分解:

$5^1\times {\mathrm{11}}^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{151}}^1$

素因数の和:208

約数の個数: 48

約数和(自身を含む): 30566592

約数和(自身を除く): 10377137

約数列:

[1, 5, 11, 13, 17, 55, 65, 85, 121, 143, 151, 187, 221, 605, 715, 755, 935, 1105, 1573, 1661, 1963, 2057, 2431, 2567, 7865, 8305, 9815, 10285, 12155, 12835, 18271, 21593, 26741, 28237, 33371, 91355, 107965, 133705, 141185, 166855, 237523, 310607, 367081, 1187615, 1553035, 1835405, 4037891, 20189455]

約数ペア:

[(1, 20189455), (5, 4037891), (11, 1835405), (13, 1553035), (17, 1187615), (55, 367081), (65, 310607), (85, 237523), (121, 166855), (143, 141185), (151, 133705), (187, 107965), (221, 91355), (605, 33371), (715, 28237), (755, 26741), (935, 21593), (1105, 18271), (1573, 12835), (1661, 12155), (1963, 10285), (2057, 9815), (2431, 8305), (2567, 7865)]