257558540

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{127}}^1\times {\mathrm{3271}}^1$

素因数の和:3438

約数の個数: 48

約数和(自身を含む): 562888704

約数和(自身を除く): 305330164

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 127, 155, 254, 310, 508, 620, 635, 1270, 2540, 3271, 3937, 6542, 7874, 13084, 15748, 16355, 19685, 32710, 39370, 65420, 78740, 101401, 202802, 405604, 415417, 507005, 830834, 1014010, 1661668, 2028020, 2077085, 4154170, 8308340, 12877927, 25755854, 51511708, 64389635, 128779270, 257558540]

約数ペア:

[(1, 257558540), (2, 128779270), (4, 64389635), (5, 51511708), (10, 25755854), (20, 12877927), (31, 8308340), (62, 4154170), (124, 2077085), (127, 2028020), (155, 1661668), (254, 1014010), (310, 830834), (508, 507005), (620, 415417), (635, 405604), (1270, 202802), (2540, 101401), (3271, 78740), (3937, 65420), (6542, 39370), (7874, 32710), (13084, 19685), (15748, 16355)]