256250800

素因数分解:

$2^4\times 5^2\times {\mathrm{13}}^1\times {\mathrm{49279}}^1$

素因数の和:49310

約数の個数: 60

約数和(自身を含む): 663013120

約数和(自身を除く): 406762320

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 25, 26, 40, 50, 52, 65, 80, 100, 104, 130, 200, 208, 260, 325, 400, 520, 650, 1040, 1300, 2600, 5200, 49279, 98558, 197116, 246395, 394232, 492790, 640627, 788464, 985580, 1231975, 1281254, 1971160, 2463950, 2562508, 3203135, 3942320, 4927900, 5125016, 6406270, 9855800, 10250032, 12812540, 16015675, 19711600, 25625080, 32031350, 51250160, 64062700, 128125400, 256250800]

約数ペア:

[(1, 256250800), (2, 128125400), (4, 64062700), (5, 51250160), (8, 32031350), (10, 25625080), (13, 19711600), (16, 16015675), (20, 12812540), (25, 10250032), (26, 9855800), (40, 6406270), (50, 5125016), (52, 4927900), (65, 3942320), (80, 3203135), (100, 2562508), (104, 2463950), (130, 1971160), (200, 1281254), (208, 1231975), (260, 985580), (325, 788464), (400, 640627), (520, 492790), (650, 394232), (1040, 246395), (1300, 197116), (2600, 98558), (5200, 49279)]