28293867

素因数分解:

$3^4\times 7^1\times {\mathrm{139}}^1\times {\mathrm{359}}^1$

素因数の和:517

約数の個数: 40

約数和(自身を含む): 48787200

約数和(自身を除く): 20493333

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 139, 189, 359, 417, 567, 973, 1077, 1251, 2513, 2919, 3231, 3753, 7539, 8757, 9693, 11259, 22617, 26271, 29079, 49901, 67851, 78813, 149703, 203553, 349307, 449109, 1047921, 1347327, 3143763, 4041981, 9431289, 28293867]

約数ペア:

[(1, 28293867), (3, 9431289), (7, 4041981), (9, 3143763), (21, 1347327), (27, 1047921), (63, 449109), (81, 349307), (139, 203553), (189, 149703), (359, 78813), (417, 67851), (567, 49901), (973, 29079), (1077, 26271), (1251, 22617), (2513, 11259), (2919, 9693), (3231, 8757), (3753, 7539)]