263780

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{109}}^1$

素因数の和:140

約数の個数: 36

約数和(自身を含む): 614460

約数和(自身を除く): 350680

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 109, 110, 121, 218, 220, 242, 436, 484, 545, 605, 1090, 1199, 1210, 2180, 2398, 2420, 4796, 5995, 11990, 13189, 23980, 26378, 52756, 65945, 131890, 263780]

約数ペア:

[(1, 263780), (2, 131890), (4, 65945), (5, 52756), (10, 26378), (11, 23980), (20, 13189), (22, 11990), (44, 5995), (55, 4796), (109, 2420), (110, 2398), (121, 2180), (218, 1210), (220, 1199), (242, 1090), (436, 605), (484, 545)]