21256170

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{54503}}^1$

素因数の和:54526

約数の個数: 32

約数和(自身を含む): 54940032

約数和(自身を除く): 33683862

約数列:

[1, 2, 3, 5, 6, 10, 13, 15, 26, 30, 39, 65, 78, 130, 195, 390, 54503, 109006, 163509, 272515, 327018, 545030, 708539, 817545, 1417078, 1635090, 2125617, 3542695, 4251234, 7085390, 10628085, 21256170]

約数ペア:

[(1, 21256170), (2, 10628085), (3, 7085390), (5, 4251234), (6, 3542695), (10, 2125617), (13, 1635090), (15, 1417078), (26, 817545), (30, 708539), (39, 545030), (65, 327018), (78, 272515), (130, 163509), (195, 109006), (390, 54503)]