21709595

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{53}}^1\times {\mathrm{61}}^1\times {\mathrm{79}}^1$

素因数の和:215

約数の個数: 32

約数和(自身を含む): 28926720

約数和(自身を除く): 7217125

約数列:

[1, 5, 17, 53, 61, 79, 85, 265, 305, 395, 901, 1037, 1343, 3233, 4187, 4505, 4819, 5185, 6715, 16165, 20935, 24095, 54961, 71179, 81923, 255407, 274805, 355895, 409615, 1277035, 4341919, 21709595]

約数ペア:

[(1, 21709595), (5, 4341919), (17, 1277035), (53, 409615), (61, 355895), (79, 274805), (85, 255407), (265, 81923), (305, 71179), (395, 54961), (901, 24095), (1037, 20935), (1343, 16165), (3233, 6715), (4187, 5185), (4505, 4819)]