28478715

素因数分解:

$3^1\times 5^1\times {\mathrm{23}}^2\times {\mathrm{37}}^1\times {\mathrm{97}}^1$

素因数の和:188

約数の個数: 48

約数和(自身を含む): 49424928

約数和(自身を除く): 20946213

約数列:

[1, 3, 5, 15, 23, 37, 69, 97, 111, 115, 185, 291, 345, 485, 529, 555, 851, 1455, 1587, 2231, 2553, 2645, 3589, 4255, 6693, 7935, 10767, 11155, 12765, 17945, 19573, 33465, 51313, 53835, 58719, 82547, 97865, 153939, 247641, 256565, 293595, 412735, 769695, 1238205, 1898581, 5695743, 9492905, 28478715]

約数ペア:

[(1, 28478715), (3, 9492905), (5, 5695743), (15, 1898581), (23, 1238205), (37, 769695), (69, 412735), (97, 293595), (111, 256565), (115, 247641), (185, 153939), (291, 97865), (345, 82547), (485, 58719), (529, 53835), (555, 51313), (851, 33465), (1455, 19573), (1587, 17945), (2231, 12765), (2553, 11155), (2645, 10767), (3589, 7935), (4255, 6693)]