257418980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{141439}}^1$

素因数の和:141468

約数の個数: 48

約数和(自身を含む): 665333760

約数和(自身を除く): 407914780

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 35, 52, 65, 70, 91, 130, 140, 182, 260, 364, 455, 910, 1820, 141439, 282878, 565756, 707195, 990073, 1414390, 1838707, 1980146, 2828780, 3677414, 3960292, 4950365, 7354828, 9193535, 9900730, 12870949, 18387070, 19801460, 25741898, 36774140, 51483796, 64354745, 128709490, 257418980]

約数ペア:

[(1, 257418980), (2, 128709490), (4, 64354745), (5, 51483796), (7, 36774140), (10, 25741898), (13, 19801460), (14, 18387070), (20, 12870949), (26, 9900730), (28, 9193535), (35, 7354828), (52, 4950365), (65, 3960292), (70, 3677414), (91, 2828780), (130, 1980146), (140, 1838707), (182, 1414390), (260, 990073), (364, 707195), (455, 565756), (910, 282878), (1820, 141439)]