21458913

素因数分解:

$3^1\times 7^2\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{277}}^1$

素因数の和:342

約数の個数: 48

約数和(自身を含む): 36509184

約数和(自身を除く): 15050271

約数列:

[1, 3, 7, 17, 21, 31, 49, 51, 93, 119, 147, 217, 277, 357, 527, 651, 831, 833, 1519, 1581, 1939, 2499, 3689, 4557, 4709, 5817, 8587, 11067, 13573, 14127, 25761, 25823, 32963, 40719, 60109, 77469, 98889, 145979, 180327, 230741, 420763, 437937, 692223, 1021853, 1262289, 3065559, 7152971, 21458913]

約数ペア:

[(1, 21458913), (3, 7152971), (7, 3065559), (17, 1262289), (21, 1021853), (31, 692223), (49, 437937), (51, 420763), (93, 230741), (119, 180327), (147, 145979), (217, 98889), (277, 77469), (357, 60109), (527, 40719), (651, 32963), (831, 25823), (833, 25761), (1519, 14127), (1581, 13573), (1939, 11067), (2499, 8587), (3689, 5817), (4557, 4709)]