20171907

素因数分解:

$3^2\times 7^1\times {\mathrm{29}}^1\times {\mathrm{61}}^1\times {\mathrm{181}}^1$

素因数の和:284

約数の個数: 48

約数和(自身を含む): 35206080

約数和(自身を除く): 15034173

約数列:

[1, 3, 7, 9, 21, 29, 61, 63, 87, 181, 183, 203, 261, 427, 543, 549, 609, 1267, 1281, 1629, 1769, 1827, 3801, 3843, 5249, 5307, 11041, 11403, 12383, 15747, 15921, 33123, 36743, 37149, 47241, 77287, 99369, 110229, 111447, 231861, 320189, 330687, 695583, 960567, 2241323, 2881701, 6723969, 20171907]

約数ペア:

[(1, 20171907), (3, 6723969), (7, 2881701), (9, 2241323), (21, 960567), (29, 695583), (61, 330687), (63, 320189), (87, 231861), (181, 111447), (183, 110229), (203, 99369), (261, 77287), (427, 47241), (543, 37149), (549, 36743), (609, 33123), (1267, 15921), (1281, 15747), (1629, 12383), (1769, 11403), (1827, 11041), (3801, 5307), (3843, 5249)]