20851551

素因数分解:

$3^2\times 7^1\times {\mathrm{29}}^1\times {\mathrm{101}}^1\times {\mathrm{113}}^1$

素因数の和:256

約数の個数: 48

約数和(自身を含む): 36279360

約数和(自身を除く): 15427809

約数列:

[1, 3, 7, 9, 21, 29, 63, 87, 101, 113, 203, 261, 303, 339, 609, 707, 791, 909, 1017, 1827, 2121, 2373, 2929, 3277, 6363, 7119, 8787, 9831, 11413, 20503, 22939, 26361, 29493, 34239, 61509, 68817, 79891, 102717, 184527, 206451, 239673, 330977, 719019, 992931, 2316839, 2978793, 6950517, 20851551]

約数ペア:

[(1, 20851551), (3, 6950517), (7, 2978793), (9, 2316839), (21, 992931), (29, 719019), (63, 330977), (87, 239673), (101, 206451), (113, 184527), (203, 102717), (261, 79891), (303, 68817), (339, 61509), (609, 34239), (707, 29493), (791, 26361), (909, 22939), (1017, 20503), (1827, 11413), (2121, 9831), (2373, 8787), (2929, 7119), (3277, 6363)]