20847240

素因数分解:

$2^3\times 3^3\times 5^1\times {\mathrm{97}}^1\times {\mathrm{199}}^1$

素因数の和:316

約数の個数: 128

約数和(自身を含む): 70560000

約数和(自身を除く): 49712760

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 20, 24, 27, 30, 36, 40, 45, 54, 60, 72, 90, 97, 108, 120, 135, 180, 194, 199, 216, 270, 291, 360, 388, 398, 485, 540, 582, 597, 776, 796, 873, 970, 995, 1080, 1164, 1194, 1455, 1592, 1746, 1791, 1940, 1990, 2328, 2388, 2619, 2910, 2985, 3492, 3582, 3880, 3980, 4365, 4776, 5238, 5373, 5820, 5970, 6984, 7164, 7960, 8730, 8955, 10476, 10746, 11640, 11940, 13095, 14328, 17460, 17910, 19303, 20952, 21492, 23880, 26190, 26865, 34920, 35820, 38606, 42984, 52380, 53730, 57909, 71640, 77212, 96515, 104760, 107460, 115818, 154424, 173727, 193030, 214920, 231636, 289545, 347454, 386060, 463272, 521181, 579090, 694908, 772120, 868635, 1042362, 1158180, 1389816, 1737270, 2084724, 2316360, 2605905, 3474540, 4169448, 5211810, 6949080, 10423620, 20847240]

約数ペア:

[(1, 20847240), (2, 10423620), (3, 6949080), (4, 5211810), (5, 4169448), (6, 3474540), (8, 2605905), (9, 2316360), (10, 2084724), (12, 1737270), (15, 1389816), (18, 1158180), (20, 1042362), (24, 868635), (27, 772120), (30, 694908), (36, 579090), (40, 521181), (45, 463272), (54, 386060), (60, 347454), (72, 289545), (90, 231636), (97, 214920), (108, 193030), (120, 173727), (135, 154424), (180, 115818), (194, 107460), (199, 104760), (216, 96515), (270, 77212), (291, 71640), (360, 57909), (388, 53730), (398, 52380), (485, 42984), (540, 38606), (582, 35820), (597, 34920), (776, 26865), (796, 26190), (873, 23880), (970, 21492), (995, 20952), (1080, 19303), (1164, 17910), (1194, 17460), (1455, 14328), (1592, 13095), (1746, 11940), (1791, 11640), (1940, 10746), (1990, 10476), (2328, 8955), (2388, 8730), (2619, 7960), (2910, 7164), (2985, 6984), (3492, 5970), (3582, 5820), (3880, 5373), (3980, 5238), (4365, 4776)]