20685860

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{79561}}^1$

素因数の和:79583

約数の個数: 24

約数和(自身を含む): 46782456

約数和(自身を除く): 26096596

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 79561, 159122, 318244, 397805, 795610, 1034293, 1591220, 2068586, 4137172, 5171465, 10342930, 20685860]

約数ペア:

[(1, 20685860), (2, 10342930), (4, 5171465), (5, 4137172), (10, 2068586), (13, 1591220), (20, 1034293), (26, 795610), (52, 397805), (65, 318244), (130, 159122), (260, 79561)]