20781981

素因数分解:

$3^3\times {\mathrm{11}}^1\times {\mathrm{167}}^1\times {\mathrm{419}}^1$

素因数の和:606

約数の個数: 32

約数和(自身を含む): 33868800

約数和(自身を除く): 13086819

約数列:

[1, 3, 9, 11, 27, 33, 99, 167, 297, 419, 501, 1257, 1503, 1837, 3771, 4509, 4609, 5511, 11313, 13827, 16533, 41481, 49599, 69973, 124443, 209919, 629757, 769703, 1889271, 2309109, 6927327, 20781981]

約数ペア:

[(1, 20781981), (3, 6927327), (9, 2309109), (11, 1889271), (27, 769703), (33, 629757), (99, 209919), (167, 124443), (297, 69973), (419, 49599), (501, 41481), (1257, 16533), (1503, 13827), (1837, 11313), (3771, 5511), (4509, 4609)]