20805440

素因数分解:

$2^6\times 5^1\times {\mathrm{79}}^1\times {\mathrm{823}}^1$

素因数の和:919

約数の個数: 56

約数和(自身を含む): 50231040

約数和(自身を除く): 29425600

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 79, 80, 158, 160, 316, 320, 395, 632, 790, 823, 1264, 1580, 1646, 2528, 3160, 3292, 4115, 5056, 6320, 6584, 8230, 12640, 13168, 16460, 25280, 26336, 32920, 52672, 65017, 65840, 130034, 131680, 260068, 263360, 325085, 520136, 650170, 1040272, 1300340, 2080544, 2600680, 4161088, 5201360, 10402720, 20805440]

約数ペア:

[(1, 20805440), (2, 10402720), (4, 5201360), (5, 4161088), (8, 2600680), (10, 2080544), (16, 1300340), (20, 1040272), (32, 650170), (40, 520136), (64, 325085), (79, 263360), (80, 260068), (158, 131680), (160, 130034), (316, 65840), (320, 65017), (395, 52672), (632, 32920), (790, 26336), (823, 25280), (1264, 16460), (1580, 13168), (1646, 12640), (2528, 8230), (3160, 6584), (3292, 6320), (4115, 5056)]