19918115

素因数分解:

$5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{109}}^1\times {\mathrm{227}}^1$

素因数の和:371

約数の個数: 32

約数和(自身を含む): 28892160

約数和(自身を除く): 8974045

約数列:

[1, 5, 7, 23, 35, 109, 115, 161, 227, 545, 763, 805, 1135, 1589, 2507, 3815, 5221, 7945, 12535, 17549, 24743, 26105, 36547, 87745, 123715, 173201, 182735, 569089, 866005, 2845445, 3983623, 19918115]

約数ペア:

[(1, 19918115), (5, 3983623), (7, 2845445), (23, 866005), (35, 569089), (109, 182735), (115, 173201), (161, 123715), (227, 87745), (545, 36547), (763, 26105), (805, 24743), (1135, 17549), (1589, 12535), (2507, 7945), (3815, 5221)]