31491837

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{71}}^1\times {\mathrm{223}}^1$

素因数の和:330

約数の個数: 48

約数和(自身を含む): 52835328

約数和(自身を除く): 21343491

約数列:

[1, 3, 9, 13, 17, 39, 51, 71, 117, 153, 213, 221, 223, 639, 663, 669, 923, 1207, 1989, 2007, 2769, 2899, 3621, 3791, 8307, 8697, 10863, 11373, 15691, 15833, 26091, 34119, 47073, 47499, 49283, 141219, 142497, 147849, 205829, 269161, 443547, 617487, 807483, 1852461, 2422449, 3499093, 10497279, 31491837]

約数ペア:

[(1, 31491837), (3, 10497279), (9, 3499093), (13, 2422449), (17, 1852461), (39, 807483), (51, 617487), (71, 443547), (117, 269161), (153, 205829), (213, 147849), (221, 142497), (223, 141219), (639, 49283), (663, 47499), (669, 47073), (923, 34119), (1207, 26091), (1989, 15833), (2007, 15691), (2769, 11373), (2899, 10863), (3621, 8697), (3791, 8307)]