20394801

素因数分解:

$3^3\times 7^1\times {\mathrm{29}}^1\times {\mathrm{61}}^2$

素因数の和:167

約数の個数: 48

約数和(自身を含む): 36316800

約数和(自身を除く): 15921999

約数列:

[1, 3, 7, 9, 21, 27, 29, 61, 63, 87, 183, 189, 203, 261, 427, 549, 609, 783, 1281, 1647, 1769, 1827, 3721, 3843, 5307, 5481, 11163, 11529, 12383, 15921, 26047, 33489, 37149, 47763, 78141, 100467, 107909, 111447, 234423, 323727, 334341, 703269, 755363, 971181, 2266089, 2913543, 6798267, 20394801]

約数ペア:

[(1, 20394801), (3, 6798267), (7, 2913543), (9, 2266089), (21, 971181), (27, 755363), (29, 703269), (61, 334341), (63, 323727), (87, 234423), (183, 111447), (189, 107909), (203, 100467), (261, 78141), (427, 47763), (549, 37149), (609, 33489), (783, 26047), (1281, 15921), (1647, 12383), (1769, 11529), (1827, 11163), (3721, 5481), (3843, 5307)]