257897488

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{109}}^1\times {\mathrm{181}}^1$

素因数の和:360

約数の個数: 80

約数和(自身を含む): 546145600

約数和(自身を除く): 288248112

約数列:

[1, 2, 4, 8, 16, 19, 38, 43, 76, 86, 109, 152, 172, 181, 218, 304, 344, 362, 436, 688, 724, 817, 872, 1448, 1634, 1744, 2071, 2896, 3268, 3439, 4142, 4687, 6536, 6878, 7783, 8284, 9374, 13072, 13756, 15566, 16568, 18748, 19729, 27512, 31132, 33136, 37496, 39458, 55024, 62264, 74992, 78916, 89053, 124528, 147877, 157832, 178106, 295754, 315664, 356212, 374851, 591508, 712424, 749702, 848347, 1183016, 1424848, 1499404, 1696694, 2366032, 2998808, 3393388, 5997616, 6786776, 13573552, 16118593, 32237186, 64474372, 128948744, 257897488]

約数ペア:

[(1, 257897488), (2, 128948744), (4, 64474372), (8, 32237186), (16, 16118593), (19, 13573552), (38, 6786776), (43, 5997616), (76, 3393388), (86, 2998808), (109, 2366032), (152, 1696694), (172, 1499404), (181, 1424848), (218, 1183016), (304, 848347), (344, 749702), (362, 712424), (436, 591508), (688, 374851), (724, 356212), (817, 315664), (872, 295754), (1448, 178106), (1634, 157832), (1744, 147877), (2071, 124528), (2896, 89053), (3268, 78916), (3439, 74992), (4142, 62264), (4687, 55024), (6536, 39458), (6878, 37496), (7783, 33136), (8284, 31132), (9374, 27512), (13072, 19729), (13756, 18748), (15566, 16568)]