20720260

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{4957}}^1$

素因数の和:4996

約数の個数: 48

約数和(自身を含む): 49976640

約数和(自身を除く): 29256380

約数列:

[1, 2, 4, 5, 10, 11, 19, 20, 22, 38, 44, 55, 76, 95, 110, 190, 209, 220, 380, 418, 836, 1045, 2090, 4180, 4957, 9914, 19828, 24785, 49570, 54527, 94183, 99140, 109054, 188366, 218108, 272635, 376732, 470915, 545270, 941830, 1036013, 1090540, 1883660, 2072026, 4144052, 5180065, 10360130, 20720260]

約数ペア:

[(1, 20720260), (2, 10360130), (4, 5180065), (5, 4144052), (10, 2072026), (11, 1883660), (19, 1090540), (20, 1036013), (22, 941830), (38, 545270), (44, 470915), (55, 376732), (76, 272635), (95, 218108), (110, 188366), (190, 109054), (209, 99140), (220, 94183), (380, 54527), (418, 49570), (836, 24785), (1045, 19828), (2090, 9914), (4180, 4957)]