81155120

素因数分解:

$2^4\times 5^1\times {\mathrm{79}}^1\times {\mathrm{12841}}^1$

素因数の和:12933

約数の個数: 40

約数和(自身を含む): 191088960

約数和(自身を除く): 109933840

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 79, 80, 158, 316, 395, 632, 790, 1264, 1580, 3160, 6320, 12841, 25682, 51364, 64205, 102728, 128410, 205456, 256820, 513640, 1014439, 1027280, 2028878, 4057756, 5072195, 8115512, 10144390, 16231024, 20288780, 40577560, 81155120]

約数ペア:

[(1, 81155120), (2, 40577560), (4, 20288780), (5, 16231024), (8, 10144390), (10, 8115512), (16, 5072195), (20, 4057756), (40, 2028878), (79, 1027280), (80, 1014439), (158, 513640), (316, 256820), (395, 205456), (632, 128410), (790, 102728), (1264, 64205), (1580, 51364), (3160, 25682), (6320, 12841)]