81960320

素因数分解:

$2^7\times 5^1\times {\mathrm{13}}^1\times {\mathrm{9851}}^1$

素因数の和:9883

約数の個数: 64

約数和(自身を含む): 211029840

約数和(自身を除く): 129069520

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 64, 65, 80, 104, 128, 130, 160, 208, 260, 320, 416, 520, 640, 832, 1040, 1664, 2080, 4160, 8320, 9851, 19702, 39404, 49255, 78808, 98510, 128063, 157616, 197020, 256126, 315232, 394040, 512252, 630464, 640315, 788080, 1024504, 1260928, 1280630, 1576160, 2049008, 2561260, 3152320, 4098016, 5122520, 6304640, 8196032, 10245040, 16392064, 20490080, 40980160, 81960320]

約数ペア:

[(1, 81960320), (2, 40980160), (4, 20490080), (5, 16392064), (8, 10245040), (10, 8196032), (13, 6304640), (16, 5122520), (20, 4098016), (26, 3152320), (32, 2561260), (40, 2049008), (52, 1576160), (64, 1280630), (65, 1260928), (80, 1024504), (104, 788080), (128, 640315), (130, 630464), (160, 512252), (208, 394040), (260, 315232), (320, 256126), (416, 197020), (520, 157616), (640, 128063), (832, 98510), (1040, 78808), (1664, 49255), (2080, 39404), (4160, 19702), (8320, 9851)]