21127810

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^2\times {\mathrm{19}}^1\times {\mathrm{919}}^1$

素因数の和:967

約数の個数: 48

約数和(自身を含む): 44049600

約数和(自身を除く): 22921790

約数列:

[1, 2, 5, 10, 11, 19, 22, 38, 55, 95, 110, 121, 190, 209, 242, 418, 605, 919, 1045, 1210, 1838, 2090, 2299, 4595, 4598, 9190, 10109, 11495, 17461, 20218, 22990, 34922, 50545, 87305, 101090, 111199, 174610, 192071, 222398, 384142, 555995, 960355, 1111990, 1920710, 2112781, 4225562, 10563905, 21127810]

約数ペア:

[(1, 21127810), (2, 10563905), (5, 4225562), (10, 2112781), (11, 1920710), (19, 1111990), (22, 960355), (38, 555995), (55, 384142), (95, 222398), (110, 192071), (121, 174610), (190, 111199), (209, 101090), (242, 87305), (418, 50545), (605, 34922), (919, 22990), (1045, 20218), (1210, 17461), (1838, 11495), (2090, 10109), (2299, 9190), (4595, 4598)]