20013464560

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^3\times {\mathrm{36473}}^1$

素因数の和:36543

約数の個数: 80

約数和(自身を含む): 49117347360

約数和(自身を除く): 29103882800

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 80, 95, 152, 190, 304, 361, 380, 722, 760, 1444, 1520, 1805, 2888, 3610, 5776, 6859, 7220, 13718, 14440, 27436, 28880, 34295, 36473, 54872, 68590, 72946, 109744, 137180, 145892, 182365, 274360, 291784, 364730, 548720, 583568, 692987, 729460, 1385974, 1458920, 2771948, 2917840, 3464935, 5543896, 6929870, 11087792, 13166753, 13859740, 26333506, 27719480, 52667012, 55438960, 65833765, 105334024, 131667530, 210668048, 250168307, 263335060, 500336614, 526670120, 1000673228, 1053340240, 1250841535, 2001346456, 2501683070, 4002692912, 5003366140, 10006732280, 20013464560]

約数ペア:

[(1, 20013464560), (2, 10006732280), (4, 5003366140), (5, 4002692912), (8, 2501683070), (10, 2001346456), (16, 1250841535), (19, 1053340240), (20, 1000673228), (38, 526670120), (40, 500336614), (76, 263335060), (80, 250168307), (95, 210668048), (152, 131667530), (190, 105334024), (304, 65833765), (361, 55438960), (380, 52667012), (722, 27719480), (760, 26333506), (1444, 13859740), (1520, 13166753), (1805, 11087792), (2888, 6929870), (3610, 5543896), (5776, 3464935), (6859, 2917840), (7220, 2771948), (13718, 1458920), (14440, 1385974), (27436, 729460), (28880, 692987), (34295, 583568), (36473, 548720), (54872, 364730), (68590, 291784), (72946, 274360), (109744, 182365), (137180, 145892)]