21212516

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{503}}^1\times {\mathrm{811}}^1$

素因数の和:1331

約数の個数: 24

約数和(自身を含む): 40106304

約数和(自身を除く): 18893788

約数列:

[1, 2, 4, 13, 26, 52, 503, 811, 1006, 1622, 2012, 3244, 6539, 10543, 13078, 21086, 26156, 42172, 407933, 815866, 1631732, 5303129, 10606258, 21212516]

約数ペア:

[(1, 21212516), (2, 10606258), (4, 5303129), (13, 1631732), (26, 815866), (52, 407933), (503, 42172), (811, 26156), (1006, 21086), (1622, 13078), (2012, 10543), (3244, 6539)]