20967345

素因数分解:

$3^2\times 5^1\times 7^2\times {\mathrm{37}}^1\times {\mathrm{257}}^1$

素因数の和:319

約数の個数: 72

約数和(自身を含む): 43588584

約数和(自身を除く): 22621239

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 37, 45, 49, 63, 105, 111, 147, 185, 245, 257, 259, 315, 333, 441, 555, 735, 771, 777, 1285, 1295, 1665, 1799, 1813, 2205, 2313, 2331, 3855, 3885, 5397, 5439, 8995, 9065, 9509, 11565, 11655, 12593, 16191, 16317, 26985, 27195, 28527, 37779, 47545, 62965, 66563, 80955, 81585, 85581, 113337, 142635, 188895, 199689, 332815, 427905, 465941, 566685, 599067, 998445, 1397823, 2329705, 2995335, 4193469, 6989115, 20967345]

約数ペア:

[(1, 20967345), (3, 6989115), (5, 4193469), (7, 2995335), (9, 2329705), (15, 1397823), (21, 998445), (35, 599067), (37, 566685), (45, 465941), (49, 427905), (63, 332815), (105, 199689), (111, 188895), (147, 142635), (185, 113337), (245, 85581), (257, 81585), (259, 80955), (315, 66563), (333, 62965), (441, 47545), (555, 37779), (735, 28527), (771, 27195), (777, 26985), (1285, 16317), (1295, 16191), (1665, 12593), (1799, 11655), (1813, 11565), (2205, 9509), (2313, 9065), (2331, 8995), (3855, 5439), (3885, 5397)]