64870780

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{249503}}^1$

素因数の和:249525

約数の個数: 24

約数和(自身を含む): 146708352

約数和(自身を除く): 81837572

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 249503, 499006, 998012, 1247515, 2495030, 3243539, 4990060, 6487078, 12974156, 16217695, 32435390, 64870780]

約数ペア:

[(1, 64870780), (2, 32435390), (4, 16217695), (5, 12974156), (10, 6487078), (13, 4990060), (20, 3243539), (26, 2495030), (52, 1247515), (65, 998012), (130, 499006), (260, 249503)]