21115955

素因数分解:

$5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{1543}}^1$

素因数の和:1595

約数の個数: 32

約数和(自身を含む): 32016384

約数和(自身を除く): 10900429

約数列:

[1, 5, 7, 17, 23, 35, 85, 115, 119, 161, 391, 595, 805, 1543, 1955, 2737, 7715, 10801, 13685, 26231, 35489, 54005, 131155, 177445, 183617, 248423, 603313, 918085, 1242115, 3016565, 4223191, 21115955]

約数ペア:

[(1, 21115955), (5, 4223191), (7, 3016565), (17, 1242115), (23, 918085), (35, 603313), (85, 248423), (115, 183617), (119, 177445), (161, 131155), (391, 54005), (595, 35489), (805, 26231), (1543, 13685), (1955, 10801), (2737, 7715)]