21704985

素因数分解:

$3^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{67}}^1\times {\mathrm{313}}^1$

素因数の和:414

約数の個数: 48

約数和(自身を含む): 39970944

約数和(自身を除く): 18265959

約数列:

[1, 3, 5, 9, 15, 23, 45, 67, 69, 115, 201, 207, 313, 335, 345, 603, 939, 1005, 1035, 1541, 1565, 2817, 3015, 4623, 4695, 7199, 7705, 13869, 14085, 20971, 21597, 23115, 35995, 62913, 64791, 69345, 104855, 107985, 188739, 314565, 323955, 482333, 943695, 1446999, 2411665, 4340997, 7234995, 21704985]

約数ペア:

[(1, 21704985), (3, 7234995), (5, 4340997), (9, 2411665), (15, 1446999), (23, 943695), (45, 482333), (67, 323955), (69, 314565), (115, 188739), (201, 107985), (207, 104855), (313, 69345), (335, 64791), (345, 62913), (603, 35995), (939, 23115), (1005, 21597), (1035, 20971), (1541, 14085), (1565, 13869), (2817, 7705), (3015, 7199), (4623, 4695)]