18621729

素因数分解:

$3^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{331}}^1$

素因数の和:410

約数の個数: 48

約数和(自身を含む): 33146880

約数和(自身を除く): 14525151

約数列:

[1, 3, 7, 9, 19, 21, 47, 57, 63, 133, 141, 171, 329, 331, 399, 423, 893, 987, 993, 1197, 2317, 2679, 2961, 2979, 6251, 6289, 6951, 8037, 15557, 18753, 18867, 20853, 44023, 46671, 56259, 56601, 108899, 132069, 140013, 295583, 326697, 396207, 886749, 980091, 2069081, 2660247, 6207243, 18621729]

約数ペア:

[(1, 18621729), (3, 6207243), (7, 2660247), (9, 2069081), (19, 980091), (21, 886749), (47, 396207), (57, 326697), (63, 295583), (133, 140013), (141, 132069), (171, 108899), (329, 56601), (331, 56259), (399, 46671), (423, 44023), (893, 20853), (987, 18867), (993, 18753), (1197, 15557), (2317, 8037), (2679, 6951), (2961, 6289), (2979, 6251)]