81497915

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{157}}^1\times {\mathrm{197}}^1$

素因数の和:407

約数の個数: 32

約数和(自身を含む): 108117504

約数和(自身を除く): 26619589

約数列:

[1, 5, 17, 31, 85, 155, 157, 197, 527, 785, 985, 2635, 2669, 3349, 4867, 6107, 13345, 16745, 24335, 30535, 30929, 82739, 103819, 154645, 413695, 519095, 525793, 958799, 2628965, 4793995, 16299583, 81497915]

約数ペア:

[(1, 81497915), (5, 16299583), (17, 4793995), (31, 2628965), (85, 958799), (155, 525793), (157, 519095), (197, 413695), (527, 154645), (785, 103819), (985, 82739), (2635, 30929), (2669, 30535), (3349, 24335), (4867, 16745), (6107, 13345)]