20720648

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{6427}}^1$

素因数の和:6477

約数の個数: 32

約数和(自身を含む): 43196160

約数和(自身を除く): 22475512

約数列:

[1, 2, 4, 8, 13, 26, 31, 52, 62, 104, 124, 248, 403, 806, 1612, 3224, 6427, 12854, 25708, 51416, 83551, 167102, 199237, 334204, 398474, 668408, 796948, 1593896, 2590081, 5180162, 10360324, 20720648]

約数ペア:

[(1, 20720648), (2, 10360324), (4, 5180162), (8, 2590081), (13, 1593896), (26, 796948), (31, 668408), (52, 398474), (62, 334204), (104, 199237), (124, 167102), (248, 83551), (403, 51416), (806, 25708), (1612, 12854), (3224, 6427)]