18971915

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{3659}}^1$

素因数の和:3742

約数の個数: 16

約数和(自身を含む): 24507360

約数和(自身を除く): 5535445

約数列:

[1, 5, 17, 61, 85, 305, 1037, 3659, 5185, 18295, 62203, 223199, 311015, 1115995, 3794383, 18971915]

約数ペア:

[(1, 18971915), (5, 3794383), (17, 1115995), (61, 311015), (85, 223199), (305, 62203), (1037, 18295), (3659, 5185)]