18966815

素因数分解:

$5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{127}}^1\times {\mathrm{251}}^1$

素因数の和:407

約数の個数: 32

約数和(自身を含む): 27869184

約数和(自身を除く): 8902369

約数列:

[1, 5, 7, 17, 35, 85, 119, 127, 251, 595, 635, 889, 1255, 1757, 2159, 4267, 4445, 8785, 10795, 15113, 21335, 29869, 31877, 75565, 149345, 159385, 223139, 541909, 1115695, 2709545, 3793363, 18966815]

約数ペア:

[(1, 18966815), (5, 3793363), (7, 2709545), (17, 1115695), (35, 541909), (85, 223139), (119, 159385), (127, 149345), (251, 75565), (595, 31877), (635, 29869), (889, 21335), (1255, 15113), (1757, 10795), (2159, 8785), (4267, 4445)]