81475120

素因数分解:

$2^4\times 5^1\times {\mathrm{1018439}}^1$

素因数の和:1018452

約数の個数: 20

約数和(自身を含む): 189429840

約数和(自身を除く): 107954720

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1018439, 2036878, 4073756, 5092195, 8147512, 10184390, 16295024, 20368780, 40737560, 81475120]

約数ペア:

[(1, 81475120), (2, 40737560), (4, 20368780), (5, 16295024), (8, 10184390), (10, 8147512), (16, 5092195), (20, 4073756), (40, 2036878), (80, 1018439)]