19489190

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{139}}^1\times {\mathrm{2003}}^1$

素因数の和:2156

約数の個数: 32

約数和(自身を含む): 40400640

約数和(自身を除く): 20911450

約数列:

[1, 2, 5, 7, 10, 14, 35, 70, 139, 278, 695, 973, 1390, 1946, 2003, 4006, 4865, 9730, 10015, 14021, 20030, 28042, 70105, 140210, 278417, 556834, 1392085, 1948919, 2784170, 3897838, 9744595, 19489190]

約数ペア:

[(1, 19489190), (2, 9744595), (5, 3897838), (7, 2784170), (10, 1948919), (14, 1392085), (35, 556834), (70, 278417), (139, 140210), (278, 70105), (695, 28042), (973, 20030), (1390, 14021), (1946, 10015), (2003, 9730), (4006, 4865)]