21294819

素因数分解:

$3^7\times 7^1\times {\mathrm{13}}^1\times {\mathrm{107}}^1$

素因数の和:148

約数の個数: 64

約数和(自身を含む): 39674880

約数和(自身を除く): 18380061

約数列:

[1, 3, 7, 9, 13, 21, 27, 39, 63, 81, 91, 107, 117, 189, 243, 273, 321, 351, 567, 729, 749, 819, 963, 1053, 1391, 1701, 2187, 2247, 2457, 2889, 3159, 4173, 5103, 6741, 7371, 8667, 9477, 9737, 12519, 15309, 20223, 22113, 26001, 28431, 29211, 37557, 60669, 66339, 78003, 87633, 112671, 182007, 199017, 234009, 262899, 338013, 546021, 788697, 1014039, 1638063, 2366091, 3042117, 7098273, 21294819]

約数ペア:

[(1, 21294819), (3, 7098273), (7, 3042117), (9, 2366091), (13, 1638063), (21, 1014039), (27, 788697), (39, 546021), (63, 338013), (81, 262899), (91, 234009), (107, 199017), (117, 182007), (189, 112671), (243, 87633), (273, 78003), (321, 66339), (351, 60669), (567, 37557), (729, 29211), (749, 28431), (819, 26001), (963, 22113), (1053, 20223), (1391, 15309), (1701, 12519), (2187, 9737), (2247, 9477), (2457, 8667), (2889, 7371), (3159, 6741), (4173, 5103)]