261399440

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{109}}^1\times {\mathrm{967}}^1$

素因数の和:1120

約数の個数: 80

約数和(自身を含む): 633768960

約数和(自身を除く): 372369520

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 62, 80, 109, 124, 155, 218, 248, 310, 436, 496, 545, 620, 872, 967, 1090, 1240, 1744, 1934, 2180, 2480, 3379, 3868, 4360, 4835, 6758, 7736, 8720, 9670, 13516, 15472, 16895, 19340, 27032, 29977, 33790, 38680, 54064, 59954, 67580, 77360, 105403, 119908, 135160, 149885, 210806, 239816, 270320, 299770, 421612, 479632, 527015, 599540, 843224, 1054030, 1199080, 1686448, 2108060, 2398160, 3267493, 4216120, 6534986, 8432240, 13069972, 16337465, 26139944, 32674930, 52279888, 65349860, 130699720, 261399440]

約数ペア:

[(1, 261399440), (2, 130699720), (4, 65349860), (5, 52279888), (8, 32674930), (10, 26139944), (16, 16337465), (20, 13069972), (31, 8432240), (40, 6534986), (62, 4216120), (80, 3267493), (109, 2398160), (124, 2108060), (155, 1686448), (218, 1199080), (248, 1054030), (310, 843224), (436, 599540), (496, 527015), (545, 479632), (620, 421612), (872, 299770), (967, 270320), (1090, 239816), (1240, 210806), (1744, 149885), (1934, 135160), (2180, 119908), (2480, 105403), (3379, 77360), (3868, 67580), (4360, 59954), (4835, 54064), (6758, 38680), (7736, 33790), (8720, 29977), (9670, 27032), (13516, 19340), (15472, 16895)]