81359320

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{223}}^1\times {\mathrm{1303}}^1$

素因数の和:1544

約数の個数: 64

約数和(自身を含む): 210309120

約数和(自身を除く): 128949800

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 223, 280, 446, 892, 1115, 1303, 1561, 1784, 2230, 2606, 3122, 4460, 5212, 6244, 6515, 7805, 8920, 9121, 10424, 12488, 13030, 15610, 18242, 26060, 31220, 36484, 45605, 52120, 62440, 72968, 91210, 182420, 290569, 364840, 581138, 1162276, 1452845, 2033983, 2324552, 2905690, 4067966, 5811380, 8135932, 10169915, 11622760, 16271864, 20339830, 40679660, 81359320]

約数ペア:

[(1, 81359320), (2, 40679660), (4, 20339830), (5, 16271864), (7, 11622760), (8, 10169915), (10, 8135932), (14, 5811380), (20, 4067966), (28, 2905690), (35, 2324552), (40, 2033983), (56, 1452845), (70, 1162276), (140, 581138), (223, 364840), (280, 290569), (446, 182420), (892, 91210), (1115, 72968), (1303, 62440), (1561, 52120), (1784, 45605), (2230, 36484), (2606, 31220), (3122, 26060), (4460, 18242), (5212, 15610), (6244, 13030), (6515, 12488), (7805, 10424), (8920, 9121)]