28208271

素因数分解:

$3^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{509}}^1$

素因数の和:568

約数の個数: 48

約数和(自身を含む): 48837600

約数和(自身を除く): 20629329

約数列:

[1, 3, 7, 13, 21, 29, 39, 49, 87, 91, 147, 203, 273, 377, 509, 609, 637, 1131, 1421, 1527, 1911, 2639, 3563, 4263, 6617, 7917, 10689, 14761, 18473, 19851, 24941, 44283, 46319, 55419, 74823, 103327, 138957, 191893, 309981, 324233, 575679, 723289, 972699, 1343251, 2169867, 4029753, 9402757, 28208271]

約数ペア:

[(1, 28208271), (3, 9402757), (7, 4029753), (13, 2169867), (21, 1343251), (29, 972699), (39, 723289), (49, 575679), (87, 324233), (91, 309981), (147, 191893), (203, 138957), (273, 103327), (377, 74823), (509, 55419), (609, 46319), (637, 44283), (1131, 24941), (1421, 19851), (1527, 18473), (1911, 14761), (2639, 10689), (3563, 7917), (4263, 6617)]