28247765

素因数分解:

$5^1\times 7^4\times {\mathrm{13}}^1\times {\mathrm{181}}^1$

素因数の和:227

約数の個数: 40

約数和(自身を含む): 42821688

約数和(自身を除く): 14573923

約数列:

[1, 5, 7, 13, 35, 49, 65, 91, 181, 245, 343, 455, 637, 905, 1267, 1715, 2353, 2401, 3185, 4459, 6335, 8869, 11765, 12005, 16471, 22295, 31213, 44345, 62083, 82355, 115297, 156065, 310415, 434581, 576485, 807079, 2172905, 4035395, 5649553, 28247765]

約数ペア:

[(1, 28247765), (5, 5649553), (7, 4035395), (13, 2172905), (35, 807079), (49, 576485), (65, 434581), (91, 310415), (181, 156065), (245, 115297), (343, 82355), (455, 62083), (637, 44345), (905, 31213), (1267, 22295), (1715, 16471), (2353, 12005), (2401, 11765), (3185, 8869), (4459, 6335)]