28185820

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^2\times {\mathrm{31}}^1\times {\mathrm{269}}^1$

素因数の和:335

約数の個数: 72

約数和(自身を含む): 66407040

約数和(自身を除く): 38221220

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 31, 52, 62, 65, 124, 130, 155, 169, 260, 269, 310, 338, 403, 538, 620, 676, 806, 845, 1076, 1345, 1612, 1690, 2015, 2690, 3380, 3497, 4030, 5239, 5380, 6994, 8060, 8339, 10478, 13988, 16678, 17485, 20956, 26195, 33356, 34970, 41695, 45461, 52390, 69940, 83390, 90922, 104780, 108407, 166780, 181844, 216814, 227305, 433628, 454610, 542035, 909220, 1084070, 1409291, 2168140, 2818582, 5637164, 7046455, 14092910, 28185820]

約数ペア:

[(1, 28185820), (2, 14092910), (4, 7046455), (5, 5637164), (10, 2818582), (13, 2168140), (20, 1409291), (26, 1084070), (31, 909220), (52, 542035), (62, 454610), (65, 433628), (124, 227305), (130, 216814), (155, 181844), (169, 166780), (260, 108407), (269, 104780), (310, 90922), (338, 83390), (403, 69940), (538, 52390), (620, 45461), (676, 41695), (806, 34970), (845, 33356), (1076, 26195), (1345, 20956), (1612, 17485), (1690, 16678), (2015, 13988), (2690, 10478), (3380, 8339), (3497, 8060), (4030, 6994), (5239, 5380)]