28993455

素因数分解:

$3^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{109}}^1\times {\mathrm{257}}^1$

素因数の和:400

約数の個数: 48

約数和(自身を含む): 53127360

約数和(自身を除く): 24133905

約数列:

[1, 3, 5, 9, 15, 23, 45, 69, 109, 115, 207, 257, 327, 345, 545, 771, 981, 1035, 1285, 1635, 2313, 2507, 3855, 4905, 5911, 7521, 11565, 12535, 17733, 22563, 28013, 29555, 37605, 53199, 84039, 88665, 112815, 140065, 252117, 265995, 420195, 644299, 1260585, 1932897, 3221495, 5798691, 9664485, 28993455]

約数ペア:

[(1, 28993455), (3, 9664485), (5, 5798691), (9, 3221495), (15, 1932897), (23, 1260585), (45, 644299), (69, 420195), (109, 265995), (115, 252117), (207, 140065), (257, 112815), (327, 88665), (345, 84039), (545, 53199), (771, 37605), (981, 29555), (1035, 28013), (1285, 22563), (1635, 17733), (2313, 12535), (2507, 11565), (3855, 7521), (4905, 5911)]