256760

素因数分解:

$2^3\times 5^1\times 7^2\times {\mathrm{131}}^1$

素因数の和:156

約数の個数: 48

約数和(自身を含む): 677160

約数和(自身を除く): 420400

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 49, 56, 70, 98, 131, 140, 196, 245, 262, 280, 392, 490, 524, 655, 917, 980, 1048, 1310, 1834, 1960, 2620, 3668, 4585, 5240, 6419, 7336, 9170, 12838, 18340, 25676, 32095, 36680, 51352, 64190, 128380, 256760]

約数ペア:

[(1, 256760), (2, 128380), (4, 64190), (5, 51352), (7, 36680), (8, 32095), (10, 25676), (14, 18340), (20, 12838), (28, 9170), (35, 7336), (40, 6419), (49, 5240), (56, 4585), (70, 3668), (98, 2620), (131, 1960), (140, 1834), (196, 1310), (245, 1048), (262, 980), (280, 917), (392, 655), (490, 524)]