18971385

素因数分解:

$3^1\times 5^1\times {\mathrm{43}}^1\times {\mathrm{67}}^1\times {\mathrm{439}}^1$

素因数の和:557

約数の個数: 32

約数和(自身を含む): 31595520

約数和(自身を除く): 12624135

約数列:

[1, 3, 5, 15, 43, 67, 129, 201, 215, 335, 439, 645, 1005, 1317, 2195, 2881, 6585, 8643, 14405, 18877, 29413, 43215, 56631, 88239, 94385, 147065, 283155, 441195, 1264759, 3794277, 6323795, 18971385]

約数ペア:

[(1, 18971385), (3, 6323795), (5, 3794277), (15, 1264759), (43, 441195), (67, 283155), (129, 147065), (201, 94385), (215, 88239), (335, 56631), (439, 43215), (645, 29413), (1005, 18877), (1317, 14405), (2195, 8643), (2881, 6585)]