20904273

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{61}}^1\times {\mathrm{101}}^1$

素因数の和:210

約数の個数: 48

約数和(自身を含む): 34529040

約数和(自身を除く): 13624767

約数列:

[1, 3, 9, 13, 29, 39, 61, 87, 101, 117, 183, 261, 303, 377, 549, 793, 909, 1131, 1313, 1769, 2379, 2929, 3393, 3939, 5307, 6161, 7137, 8787, 11817, 15921, 18483, 22997, 26361, 38077, 55449, 68991, 80093, 114231, 178669, 206973, 240279, 342693, 536007, 720837, 1608021, 2322697, 6968091, 20904273]

約数ペア:

[(1, 20904273), (3, 6968091), (9, 2322697), (13, 1608021), (29, 720837), (39, 536007), (61, 342693), (87, 240279), (101, 206973), (117, 178669), (183, 114231), (261, 80093), (303, 68991), (377, 55449), (549, 38077), (793, 26361), (909, 22997), (1131, 18483), (1313, 15921), (1769, 11817), (2379, 8787), (2929, 7137), (3393, 6161), (3939, 5307)]