81938120

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{73}}^1\times {\mathrm{2551}}^1$

素因数の和:2646

約数の個数: 64

約数和(自身を含む): 203955840

約数和(自身を除く): 122017720

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 73, 88, 110, 146, 220, 292, 365, 440, 584, 730, 803, 1460, 1606, 2551, 2920, 3212, 4015, 5102, 6424, 8030, 10204, 12755, 16060, 20408, 25510, 28061, 32120, 51020, 56122, 102040, 112244, 140305, 186223, 224488, 280610, 372446, 561220, 744892, 931115, 1122440, 1489784, 1862230, 2048453, 3724460, 4096906, 7448920, 8193812, 10242265, 16387624, 20484530, 40969060, 81938120]

約数ペア:

[(1, 81938120), (2, 40969060), (4, 20484530), (5, 16387624), (8, 10242265), (10, 8193812), (11, 7448920), (20, 4096906), (22, 3724460), (40, 2048453), (44, 1862230), (55, 1489784), (73, 1122440), (88, 931115), (110, 744892), (146, 561220), (220, 372446), (292, 280610), (365, 224488), (440, 186223), (584, 140305), (730, 112244), (803, 102040), (1460, 56122), (1606, 51020), (2551, 32120), (2920, 28061), (3212, 25510), (4015, 20408), (5102, 16060), (6424, 12755), (8030, 10204)]