21820617

素因数分解:

$3^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{83}}^1\times {\mathrm{107}}^1$

素因数の和:219

約数の個数: 64

約数和(自身を含む): 40642560

約数和(自身を除く): 18821943

約数列:

[1, 3, 7, 9, 13, 21, 27, 39, 63, 83, 91, 107, 117, 189, 249, 273, 321, 351, 581, 747, 749, 819, 963, 1079, 1391, 1743, 2241, 2247, 2457, 2889, 3237, 4173, 5229, 6741, 7553, 8881, 9711, 9737, 12519, 15687, 20223, 22659, 26643, 29133, 29211, 37557, 62167, 67977, 79929, 87633, 115453, 186501, 203931, 239787, 262899, 346359, 559503, 808171, 1039077, 1678509, 2424513, 3117231, 7273539, 21820617]

約数ペア:

[(1, 21820617), (3, 7273539), (7, 3117231), (9, 2424513), (13, 1678509), (21, 1039077), (27, 808171), (39, 559503), (63, 346359), (83, 262899), (91, 239787), (107, 203931), (117, 186501), (189, 115453), (249, 87633), (273, 79929), (321, 67977), (351, 62167), (581, 37557), (747, 29211), (749, 29133), (819, 26643), (963, 22659), (1079, 20223), (1391, 15687), (1743, 12519), (2241, 9737), (2247, 9711), (2457, 8881), (2889, 7553), (3237, 6741), (4173, 5229)]