20512455

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{257}}^1\times {\mathrm{313}}^1$

素因数の和:595

約数の個数: 32

約数和(自身を含む): 34997184

約数和(自身を除く): 14484729

約数列:

[1, 3, 5, 15, 17, 51, 85, 255, 257, 313, 771, 939, 1285, 1565, 3855, 4369, 4695, 5321, 13107, 15963, 21845, 26605, 65535, 79815, 80441, 241323, 402205, 1206615, 1367497, 4102491, 6837485, 20512455]

約数ペア:

[(1, 20512455), (3, 6837485), (5, 4102491), (15, 1367497), (17, 1206615), (51, 402205), (85, 241323), (255, 80441), (257, 79815), (313, 65535), (771, 26605), (939, 21845), (1285, 15963), (1565, 13107), (3855, 5321), (4369, 4695)]