20581911

素因数分解:

$3^3\times 7^2\times {\mathrm{47}}^1\times {\mathrm{331}}^1$

素因数の和:401

約数の個数: 48

約数和(自身を含む): 36334080

約数和(自身を除く): 15752169

約数列:

[1, 3, 7, 9, 21, 27, 47, 49, 63, 141, 147, 189, 329, 331, 423, 441, 987, 993, 1269, 1323, 2303, 2317, 2961, 2979, 6909, 6951, 8883, 8937, 15557, 16219, 20727, 20853, 46671, 48657, 62181, 62559, 108899, 140013, 145971, 326697, 420039, 437913, 762293, 980091, 2286879, 2940273, 6860637, 20581911]

約数ペア:

[(1, 20581911), (3, 6860637), (7, 2940273), (9, 2286879), (21, 980091), (27, 762293), (47, 437913), (49, 420039), (63, 326697), (141, 145971), (147, 140013), (189, 108899), (329, 62559), (331, 62181), (423, 48657), (441, 46671), (987, 20853), (993, 20727), (1269, 16219), (1323, 15557), (2303, 8937), (2317, 8883), (2961, 6951), (2979, 6909)]