20887840

素因数分解:

$2^5\times 5^1\times {\mathrm{19}}^1\times {\mathrm{6871}}^1$

素因数の和:6905

約数の個数: 48

約数和(自身を含む): 51952320

約数和(自身を除く): 31064480

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 32, 38, 40, 76, 80, 95, 152, 160, 190, 304, 380, 608, 760, 1520, 3040, 6871, 13742, 27484, 34355, 54968, 68710, 109936, 130549, 137420, 219872, 261098, 274840, 522196, 549680, 652745, 1044392, 1099360, 1305490, 2088784, 2610980, 4177568, 5221960, 10443920, 20887840]

約数ペア:

[(1, 20887840), (2, 10443920), (4, 5221960), (5, 4177568), (8, 2610980), (10, 2088784), (16, 1305490), (19, 1099360), (20, 1044392), (32, 652745), (38, 549680), (40, 522196), (76, 274840), (80, 261098), (95, 219872), (152, 137420), (160, 130549), (190, 109936), (304, 68710), (380, 54968), (608, 34355), (760, 27484), (1520, 13742), (3040, 6871)]