20219680

素因数分解:

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

素因数の和:9749

約数の個数: 48

約数和(自身を含む): 51448824

約数和(自身を除く): 31229144

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 65, 80, 104, 130, 160, 208, 260, 416, 520, 1040, 2080, 9721, 19442, 38884, 48605, 77768, 97210, 126373, 155536, 194420, 252746, 311072, 388840, 505492, 631865, 777680, 1010984, 1263730, 1555360, 2021968, 2527460, 4043936, 5054920, 10109840, 20219680]

約数ペア:

[(1, 20219680), (2, 10109840), (4, 5054920), (5, 4043936), (8, 2527460), (10, 2021968), (13, 1555360), (16, 1263730), (20, 1010984), (26, 777680), (32, 631865), (40, 505492), (52, 388840), (65, 311072), (80, 252746), (104, 194420), (130, 155536), (160, 126373), (208, 97210), (260, 77768), (416, 48605), (520, 38884), (1040, 19442), (2080, 9721)]