20781075

素因数分解:

$3^1\times 5^2\times 7^1\times {\mathrm{23}}^1\times {\mathrm{1721}}^1$

素因数の和:1764

約数の個数: 48

約数和(自身を含む): 40997376

約数和(自身を除く): 20216301

約数列:

[1, 3, 5, 7, 15, 21, 23, 25, 35, 69, 75, 105, 115, 161, 175, 345, 483, 525, 575, 805, 1721, 1725, 2415, 4025, 5163, 8605, 12047, 12075, 25815, 36141, 39583, 43025, 60235, 118749, 129075, 180705, 197915, 277081, 301175, 593745, 831243, 903525, 989575, 1385405, 2968725, 4156215, 6927025, 20781075]

約数ペア:

[(1, 20781075), (3, 6927025), (5, 4156215), (7, 2968725), (15, 1385405), (21, 989575), (23, 903525), (25, 831243), (35, 593745), (69, 301175), (75, 277081), (105, 197915), (115, 180705), (161, 129075), (175, 118749), (345, 60235), (483, 43025), (525, 39583), (575, 36141), (805, 25815), (1721, 12075), (1725, 12047), (2415, 8605), (4025, 5163)]