81229840

素因数分解:

$2^4\times 5^1\times {\mathrm{193}}^1\times {\mathrm{5261}}^1$

素因数の和:5467

約数の個数: 40

約数和(自身を含む): 189874008

約数和(自身を除く): 108644168

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 193, 386, 772, 965, 1544, 1930, 3088, 3860, 5261, 7720, 10522, 15440, 21044, 26305, 42088, 52610, 84176, 105220, 210440, 420880, 1015373, 2030746, 4061492, 5076865, 8122984, 10153730, 16245968, 20307460, 40614920, 81229840]

約数ペア:

[(1, 81229840), (2, 40614920), (4, 20307460), (5, 16245968), (8, 10153730), (10, 8122984), (16, 5076865), (20, 4061492), (40, 2030746), (80, 1015373), (193, 420880), (386, 210440), (772, 105220), (965, 84176), (1544, 52610), (1930, 42088), (3088, 26305), (3860, 21044), (5261, 15440), (7720, 10522)]