219690640

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{211241}}^1$

素因数の和:211267

約数の個数: 40

約数和(自身を含む): 550074168

約数和(自身を除く): 330383528

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 211241, 422482, 844964, 1056205, 1689928, 2112410, 2746133, 3379856, 4224820, 5492266, 8449640, 10984532, 13730665, 16899280, 21969064, 27461330, 43938128, 54922660, 109845320, 219690640]

約数ペア:

[(1, 219690640), (2, 109845320), (4, 54922660), (5, 43938128), (8, 27461330), (10, 21969064), (13, 16899280), (16, 13730665), (20, 10984532), (26, 8449640), (40, 5492266), (52, 4224820), (65, 3379856), (80, 2746133), (104, 2112410), (130, 1689928), (208, 1056205), (260, 844964), (520, 422482), (1040, 211241)]