20578792

素因数分解:

$2^3\times {\mathrm{13}}^2\times {\mathrm{31}}^1\times {\mathrm{491}}^1$

素因数の和:554

約数の個数: 48

約数和(自身を含む): 43217280

約数和(自身を除く): 22638488

約数列:

[1, 2, 4, 8, 13, 26, 31, 52, 62, 104, 124, 169, 248, 338, 403, 491, 676, 806, 982, 1352, 1612, 1964, 3224, 3928, 5239, 6383, 10478, 12766, 15221, 20956, 25532, 30442, 41912, 51064, 60884, 82979, 121768, 165958, 197873, 331916, 395746, 663832, 791492, 1582984, 2572349, 5144698, 10289396, 20578792]

約数ペア:

[(1, 20578792), (2, 10289396), (4, 5144698), (8, 2572349), (13, 1582984), (26, 791492), (31, 663832), (52, 395746), (62, 331916), (104, 197873), (124, 165958), (169, 121768), (248, 82979), (338, 60884), (403, 51064), (491, 41912), (676, 30442), (806, 25532), (982, 20956), (1352, 15221), (1612, 12766), (1964, 10478), (3224, 6383), (3928, 5239)]