20278928

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{1627}}^1$

素因数の和:1695

約数の個数: 40

約数和(自身を含む): 42393120

約数和(自身を除く): 22114192

約数列:

[1, 2, 4, 8, 16, 19, 38, 41, 76, 82, 152, 164, 304, 328, 656, 779, 1558, 1627, 3116, 3254, 6232, 6508, 12464, 13016, 26032, 30913, 61826, 66707, 123652, 133414, 247304, 266828, 494608, 533656, 1067312, 1267433, 2534866, 5069732, 10139464, 20278928]

約数ペア:

[(1, 20278928), (2, 10139464), (4, 5069732), (8, 2534866), (16, 1267433), (19, 1067312), (38, 533656), (41, 494608), (76, 266828), (82, 247304), (152, 133414), (164, 123652), (304, 66707), (328, 61826), (656, 30913), (779, 26032), (1558, 13016), (1627, 12464), (3116, 6508), (3254, 6232)]