20524520

素因数分解:

$2^3\times 5^1\times {\mathrm{263}}^1\times {\mathrm{1951}}^1$

素因数の和:2225

約数の個数: 32

約数和(自身を含む): 46379520

約数和(自身を除く): 25855000

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 263, 526, 1052, 1315, 1951, 2104, 2630, 3902, 5260, 7804, 9755, 10520, 15608, 19510, 39020, 78040, 513113, 1026226, 2052452, 2565565, 4104904, 5131130, 10262260, 20524520]

約数ペア:

[(1, 20524520), (2, 10262260), (4, 5131130), (5, 4104904), (8, 2565565), (10, 2052452), (20, 1026226), (40, 513113), (263, 78040), (526, 39020), (1052, 19510), (1315, 15608), (1951, 10520), (2104, 9755), (2630, 7804), (3902, 5260)]