80878720

素因数分解:

$2^7\times 5^1\times {\mathrm{13}}^1\times {\mathrm{9721}}^1$

素因数の和:9753

約数の個数: 64

約数和(自身を含む): 208245240

約数和(自身を除く): 127366520

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, 9721, 19442, 38884, 48605, 77768, 97210, 126373, 155536, 194420, 252746, 311072, 388840, 505492, 622144, 631865, 777680, 1010984, 1244288, 1263730, 1555360, 2021968, 2527460, 3110720, 4043936, 5054920, 6221440, 8087872, 10109840, 16175744, 20219680, 40439360, 80878720]

約数ペア:

[(1, 80878720), (2, 40439360), (4, 20219680), (5, 16175744), (8, 10109840), (10, 8087872), (13, 6221440), (16, 5054920), (20, 4043936), (26, 3110720), (32, 2527460), (40, 2021968), (52, 1555360), (64, 1263730), (65, 1244288), (80, 1010984), (104, 777680), (128, 631865), (130, 622144), (160, 505492), (208, 388840), (260, 311072), (320, 252746), (416, 194420), (520, 155536), (640, 126373), (832, 97210), (1040, 77768), (1664, 48605), (2080, 38884), (4160, 19442), (8320, 9721)]