257434840

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{495067}}^1$

素因数の和:495091

約数の個数: 32

約数和(自身を含む): 623785680

約数和(自身を除く): 366350840

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 495067, 990134, 1980268, 2475335, 3960536, 4950670, 6435871, 9901340, 12871742, 19802680, 25743484, 32179355, 51486968, 64358710, 128717420, 257434840]

約数ペア:

[(1, 257434840), (2, 128717420), (4, 64358710), (5, 51486968), (8, 32179355), (10, 25743484), (13, 19802680), (20, 12871742), (26, 9901340), (40, 6435871), (52, 4950670), (65, 3960536), (104, 2475335), (130, 1980268), (260, 990134), (520, 495067)]