257026360

素因数分解:

$2^3\times 5^1\times {\mathrm{109}}^1\times {\mathrm{167}}^1\times {\mathrm{353}}^1$

素因数の和:640

約数の個数: 64

約数和(自身を含む): 588772800

約数和(自身を除く): 331746440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 109, 167, 218, 334, 353, 436, 545, 668, 706, 835, 872, 1090, 1336, 1412, 1670, 1765, 2180, 2824, 3340, 3530, 4360, 6680, 7060, 14120, 18203, 36406, 38477, 58951, 72812, 76954, 91015, 117902, 145624, 153908, 182030, 192385, 235804, 294755, 307816, 364060, 384770, 471608, 589510, 728120, 769540, 1179020, 1539080, 2358040, 6425659, 12851318, 25702636, 32128295, 51405272, 64256590, 128513180, 257026360]

約数ペア:

[(1, 257026360), (2, 128513180), (4, 64256590), (5, 51405272), (8, 32128295), (10, 25702636), (20, 12851318), (40, 6425659), (109, 2358040), (167, 1539080), (218, 1179020), (334, 769540), (353, 728120), (436, 589510), (545, 471608), (668, 384770), (706, 364060), (835, 307816), (872, 294755), (1090, 235804), (1336, 192385), (1412, 182030), (1670, 153908), (1765, 145624), (2180, 117902), (2824, 91015), (3340, 76954), (3530, 72812), (4360, 58951), (6680, 38477), (7060, 36406), (14120, 18203)]