257840960

素因数分解:

$2^6\times 5^1\times {\mathrm{13}}^1\times {\mathrm{61981}}^1$

素因数の和:62011

約数の個数: 56

約数和(自身を含む): 661223976

約数和(自身を除く): 403383016

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 64, 65, 80, 104, 130, 160, 208, 260, 320, 416, 520, 832, 1040, 2080, 4160, 61981, 123962, 247924, 309905, 495848, 619810, 805753, 991696, 1239620, 1611506, 1983392, 2479240, 3223012, 3966784, 4028765, 4958480, 6446024, 8057530, 9916960, 12892048, 16115060, 19833920, 25784096, 32230120, 51568192, 64460240, 128920480, 257840960]

約数ペア:

[(1, 257840960), (2, 128920480), (4, 64460240), (5, 51568192), (8, 32230120), (10, 25784096), (13, 19833920), (16, 16115060), (20, 12892048), (26, 9916960), (32, 8057530), (40, 6446024), (52, 4958480), (64, 4028765), (65, 3966784), (80, 3223012), (104, 2479240), (130, 1983392), (160, 1611506), (208, 1239620), (260, 991696), (320, 805753), (416, 619810), (520, 495848), (832, 309905), (1040, 247924), (2080, 123962), (4160, 61981)]