20513900

素因数分解:

$2^2\times 5^2\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{1097}}^1$

素因数の和:1139

約数の個数: 72

約数和(自身を含む): 51465456

約数和(自身を除く): 30951556

約数列:

[1, 2, 4, 5, 10, 11, 17, 20, 22, 25, 34, 44, 50, 55, 68, 85, 100, 110, 170, 187, 220, 275, 340, 374, 425, 550, 748, 850, 935, 1097, 1100, 1700, 1870, 2194, 3740, 4388, 4675, 5485, 9350, 10970, 12067, 18649, 18700, 21940, 24134, 27425, 37298, 48268, 54850, 60335, 74596, 93245, 109700, 120670, 186490, 205139, 241340, 301675, 372980, 410278, 466225, 603350, 820556, 932450, 1025695, 1206700, 1864900, 2051390, 4102780, 5128475, 10256950, 20513900]

約数ペア:

[(1, 20513900), (2, 10256950), (4, 5128475), (5, 4102780), (10, 2051390), (11, 1864900), (17, 1206700), (20, 1025695), (22, 932450), (25, 820556), (34, 603350), (44, 466225), (50, 410278), (55, 372980), (68, 301675), (85, 241340), (100, 205139), (110, 186490), (170, 120670), (187, 109700), (220, 93245), (275, 74596), (340, 60335), (374, 54850), (425, 48268), (550, 37298), (748, 27425), (850, 24134), (935, 21940), (1097, 18700), (1100, 18649), (1700, 12067), (1870, 10970), (2194, 9350), (3740, 5485), (4388, 4675)]