81207860

素因数分解:

$2^2\times 5^1\times {\mathrm{271}}^1\times {\mathrm{14983}}^1$

素因数の和:15263

約数の個数: 24

約数和(自身を含む): 171177216

約数和(自身を除く): 89969356

約数列:

[1, 2, 4, 5, 10, 20, 271, 542, 1084, 1355, 2710, 5420, 14983, 29966, 59932, 74915, 149830, 299660, 4060393, 8120786, 16241572, 20301965, 40603930, 81207860]

約数ペア:

[(1, 81207860), (2, 40603930), (4, 20301965), (5, 16241572), (10, 8120786), (20, 4060393), (271, 299660), (542, 149830), (1084, 74915), (1355, 59932), (2710, 29966), (5420, 14983)]