20561420

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{4919}}^1$

素因数の和:4958

約数の個数: 48

約数和(自身を含む): 49593600

約数和(自身を除く): 29032180

約数列:

[1, 2, 4, 5, 10, 11, 19, 20, 22, 38, 44, 55, 76, 95, 110, 190, 209, 220, 380, 418, 836, 1045, 2090, 4180, 4919, 9838, 19676, 24595, 49190, 54109, 93461, 98380, 108218, 186922, 216436, 270545, 373844, 467305, 541090, 934610, 1028071, 1082180, 1869220, 2056142, 4112284, 5140355, 10280710, 20561420]

約数ペア:

[(1, 20561420), (2, 10280710), (4, 5140355), (5, 4112284), (10, 2056142), (11, 1869220), (19, 1082180), (20, 1028071), (22, 934610), (38, 541090), (44, 467305), (55, 373844), (76, 270545), (95, 216436), (110, 186922), (190, 108218), (209, 98380), (220, 93461), (380, 54109), (418, 49190), (836, 24595), (1045, 19676), (2090, 9838), (4180, 4919)]