20961816

素因数分解:

$2^3\times 3^1\times {\mathrm{17}}^1\times {\mathrm{83}}^1\times {\mathrm{619}}^1$

素因数の和:728

約数の個数: 64

約数和(自身を含む): 56246400

約数和(自身を除く): 35284584

約数列:

[1, 2, 3, 4, 6, 8, 12, 17, 24, 34, 51, 68, 83, 102, 136, 166, 204, 249, 332, 408, 498, 619, 664, 996, 1238, 1411, 1857, 1992, 2476, 2822, 3714, 4233, 4952, 5644, 7428, 8466, 10523, 11288, 14856, 16932, 21046, 31569, 33864, 42092, 51377, 63138, 84184, 102754, 126276, 154131, 205508, 252552, 308262, 411016, 616524, 873409, 1233048, 1746818, 2620227, 3493636, 5240454, 6987272, 10480908, 20961816]

約数ペア:

[(1, 20961816), (2, 10480908), (3, 6987272), (4, 5240454), (6, 3493636), (8, 2620227), (12, 1746818), (17, 1233048), (24, 873409), (34, 616524), (51, 411016), (68, 308262), (83, 252552), (102, 205508), (136, 154131), (166, 126276), (204, 102754), (249, 84184), (332, 63138), (408, 51377), (498, 42092), (619, 33864), (664, 31569), (996, 21046), (1238, 16932), (1411, 14856), (1857, 11288), (1992, 10523), (2476, 8466), (2822, 7428), (3714, 5644), (4233, 4952)]