21994115

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{1619}}^1$

素因数の和:1667

約数の個数: 32

約数和(自身を含む): 32659200

約数和(自身を除く): 10665085

約数列:

[1, 5, 11, 13, 19, 55, 65, 95, 143, 209, 247, 715, 1045, 1235, 1619, 2717, 8095, 13585, 17809, 21047, 30761, 89045, 105235, 153805, 231517, 338371, 399893, 1157585, 1691855, 1999465, 4398823, 21994115]

約数ペア:

[(1, 21994115), (5, 4398823), (11, 1999465), (13, 1691855), (19, 1157585), (55, 399893), (65, 338371), (95, 231517), (143, 153805), (209, 105235), (247, 89045), (715, 30761), (1045, 21047), (1235, 17809), (1619, 13585), (2717, 8095)]