21193926

素因数分解:

$2^1\times 3^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{71}}^1\times {\mathrm{89}}^1$

素因数の和:221

約数の個数: 64

約数和(自身を含む): 47900160

約数和(自身を除く): 26706234

約数列:

[1, 2, 3, 6, 13, 26, 39, 43, 71, 78, 86, 89, 129, 142, 178, 213, 258, 267, 426, 534, 559, 923, 1118, 1157, 1677, 1846, 2314, 2769, 3053, 3354, 3471, 3827, 5538, 6106, 6319, 6942, 7654, 9159, 11481, 12638, 18318, 18957, 22962, 37914, 39689, 49751, 79378, 82147, 99502, 119067, 149253, 164294, 238134, 246441, 271717, 298506, 492882, 543434, 815151, 1630302, 3532321, 7064642, 10596963, 21193926]

約数ペア:

[(1, 21193926), (2, 10596963), (3, 7064642), (6, 3532321), (13, 1630302), (26, 815151), (39, 543434), (43, 492882), (71, 298506), (78, 271717), (86, 246441), (89, 238134), (129, 164294), (142, 149253), (178, 119067), (213, 99502), (258, 82147), (267, 79378), (426, 49751), (534, 39689), (559, 37914), (923, 22962), (1118, 18957), (1157, 18318), (1677, 12638), (1846, 11481), (2314, 9159), (2769, 7654), (3053, 6942), (3354, 6319), (3471, 6106), (3827, 5538)]