21295791

素因数分解:

$3^5\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{257}}^1$

素因数の和:314

約数の個数: 48

約数和(自身を含む): 36062208

約数和(自身を除く): 14766417

約数列:

[1, 3, 9, 11, 27, 31, 33, 81, 93, 99, 243, 257, 279, 297, 341, 771, 837, 891, 1023, 2313, 2511, 2673, 2827, 3069, 6939, 7533, 7967, 8481, 9207, 20817, 23901, 25443, 27621, 62451, 71703, 76329, 82863, 87637, 215109, 228987, 262911, 645327, 686961, 788733, 1935981, 2366199, 7098597, 21295791]

約数ペア:

[(1, 21295791), (3, 7098597), (9, 2366199), (11, 1935981), (27, 788733), (31, 686961), (33, 645327), (81, 262911), (93, 228987), (99, 215109), (243, 87637), (257, 82863), (279, 76329), (297, 71703), (341, 62451), (771, 27621), (837, 25443), (891, 23901), (1023, 20817), (2313, 9207), (2511, 8481), (2673, 7967), (2827, 7533), (3069, 6939)]