28708563

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{53}}^1$

素因数の和:148

約数の個数: 64

約数和(自身を含む): 47900160

約数和(自身を除く): 19191597

約数列:

[1, 3, 13, 17, 19, 39, 43, 51, 53, 57, 129, 159, 221, 247, 323, 559, 663, 689, 731, 741, 817, 901, 969, 1007, 1677, 2067, 2193, 2279, 2451, 2703, 3021, 4199, 6837, 9503, 10621, 11713, 12597, 13091, 13889, 17119, 28509, 29627, 31863, 35139, 38743, 39273, 41667, 43301, 51357, 88881, 116229, 129903, 180557, 222547, 503659, 541671, 562913, 667641, 736117, 1510977, 1688739, 2208351, 9569521, 28708563]

約数ペア:

[(1, 28708563), (3, 9569521), (13, 2208351), (17, 1688739), (19, 1510977), (39, 736117), (43, 667641), (51, 562913), (53, 541671), (57, 503659), (129, 222547), (159, 180557), (221, 129903), (247, 116229), (323, 88881), (559, 51357), (663, 43301), (689, 41667), (731, 39273), (741, 38743), (817, 35139), (901, 31863), (969, 29627), (1007, 28509), (1677, 17119), (2067, 13889), (2193, 13091), (2279, 12597), (2451, 11713), (2703, 10621), (3021, 9503), (4199, 6837)]