18971355

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{271}}^1\times {\mathrm{359}}^1$

素因数の和:651

約数の個数: 32

約数和(自身を含む): 32901120

約数和(自身を除く): 13929765

約数列:

[1, 3, 5, 13, 15, 39, 65, 195, 271, 359, 813, 1077, 1355, 1795, 3523, 4065, 4667, 5385, 10569, 14001, 17615, 23335, 52845, 70005, 97289, 291867, 486445, 1264757, 1459335, 3794271, 6323785, 18971355]

約数ペア:

[(1, 18971355), (3, 6323785), (5, 3794271), (13, 1459335), (15, 1264757), (39, 486445), (65, 291867), (195, 97289), (271, 70005), (359, 52845), (813, 23335), (1077, 17615), (1355, 14001), (1795, 10569), (3523, 5385), (4065, 4667)]