21005019812

素因数分解:

$2^2\times 7^1\times {\mathrm{29}}^1\times {\mathrm{97}}^1\times {\mathrm{266683}}^1$

素因数の和:266820

約数の個数: 48

約数和(自身を含む): 43906853760

約数和(自身を除く): 22901833948

約数列:

[1, 2, 4, 7, 14, 28, 29, 58, 97, 116, 194, 203, 388, 406, 679, 812, 1358, 2716, 2813, 5626, 11252, 19691, 39382, 78764, 266683, 533366, 1066732, 1866781, 3733562, 7467124, 7733807, 15467614, 25868251, 30935228, 51736502, 54136649, 103473004, 108273298, 181077757, 216546596, 362155514, 724311028, 750179279, 1500358558, 3000717116, 5251254953, 10502509906, 21005019812]

約数ペア:

[(1, 21005019812), (2, 10502509906), (4, 5251254953), (7, 3000717116), (14, 1500358558), (28, 750179279), (29, 724311028), (58, 362155514), (97, 216546596), (116, 181077757), (194, 108273298), (203, 103473004), (388, 54136649), (406, 51736502), (679, 30935228), (812, 25868251), (1358, 15467614), (2716, 7733807), (2813, 7467124), (5626, 3733562), (11252, 1866781), (19691, 1066732), (39382, 533366), (78764, 266683)]