20913255280

素因数分解:

$2^4\times 5^1\times {\mathrm{4973}}^1\times {\mathrm{52567}}^1$

素因数の和:57553

約数の個数: 40

約数和(自身を含む): 48634021152

約数和(自身を除く): 27720765872

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 4973, 9946, 19892, 24865, 39784, 49730, 52567, 79568, 99460, 105134, 198920, 210268, 262835, 397840, 420536, 525670, 841072, 1051340, 2102680, 4205360, 261415691, 522831382, 1045662764, 1307078455, 2091325528, 2614156910, 4182651056, 5228313820, 10456627640, 20913255280]

約数ペア:

[(1, 20913255280), (2, 10456627640), (4, 5228313820), (5, 4182651056), (8, 2614156910), (10, 2091325528), (16, 1307078455), (20, 1045662764), (40, 522831382), (80, 261415691), (4973, 4205360), (9946, 2102680), (19892, 1051340), (24865, 841072), (39784, 525670), (49730, 420536), (52567, 397840), (79568, 262835), (99460, 210268), (105134, 198920)]