18863455

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{397}}^1$

素因数の和:475

約数の個数: 32

約数和(自身を含む): 26478144

約数和(自身を除く): 7614689

約数列:

[1, 5, 13, 17, 43, 65, 85, 215, 221, 397, 559, 731, 1105, 1985, 2795, 3655, 5161, 6749, 9503, 17071, 25805, 33745, 47515, 85355, 87737, 221923, 290207, 438685, 1109615, 1451035, 3772691, 18863455]

約数ペア:

[(1, 18863455), (5, 3772691), (13, 1451035), (17, 1109615), (43, 438685), (65, 290207), (85, 221923), (215, 87737), (221, 85355), (397, 47515), (559, 33745), (731, 25805), (1105, 17071), (1985, 9503), (2795, 6749), (3655, 5161)]