391311995

素因数分解:

$5^1\times {\mathrm{23}}^1\times {\mathrm{41}}^1\times {\mathrm{149}}^1\times {\mathrm{557}}^1$

素因数の和:775

約数の個数: 32

約数和(自身を含む): 506217600

約数和(自身を除く): 114905605

約数列:

[1, 5, 23, 41, 115, 149, 205, 557, 745, 943, 2785, 3427, 4715, 6109, 12811, 17135, 22837, 30545, 64055, 82993, 114185, 140507, 414965, 525251, 702535, 1908839, 2626255, 3402713, 9544195, 17013565, 78262399, 391311995]

約数ペア:

[(1, 391311995), (5, 78262399), (23, 17013565), (41, 9544195), (115, 3402713), (149, 2626255), (205, 1908839), (557, 702535), (745, 525251), (943, 414965), (2785, 140507), (3427, 114185), (4715, 82993), (6109, 64055), (12811, 30545), (17135, 22837)]