21993543

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{743}}^1$

素因数の和:796

約数の個数: 48

約数和(自身を含む): 38997504

約数和(自身を除く): 17003961

約数列:

[1, 3, 9, 11, 13, 23, 33, 39, 69, 99, 117, 143, 207, 253, 299, 429, 743, 759, 897, 1287, 2229, 2277, 2691, 3289, 6687, 8173, 9659, 9867, 17089, 24519, 28977, 29601, 51267, 73557, 86931, 106249, 153801, 187979, 222157, 318747, 563937, 666471, 956241, 1691811, 1999413, 2443727, 7331181, 21993543]

約数ペア:

[(1, 21993543), (3, 7331181), (9, 2443727), (11, 1999413), (13, 1691811), (23, 956241), (33, 666471), (39, 563937), (69, 318747), (99, 222157), (117, 187979), (143, 153801), (207, 106249), (253, 86931), (299, 73557), (429, 51267), (743, 29601), (759, 28977), (897, 24519), (1287, 17089), (2229, 9867), (2277, 9659), (2691, 8173), (3289, 6687)]