161638240

素因数分解:

$2^5\times 5^1\times {\mathrm{89}}^1\times {\mathrm{11351}}^1$

素因数の和:11455

約数の個数: 48

約数和(自身を含む): 386195040

約数和(自身を除く): 224556800

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 89, 160, 178, 356, 445, 712, 890, 1424, 1780, 2848, 3560, 7120, 11351, 14240, 22702, 45404, 56755, 90808, 113510, 181616, 227020, 363232, 454040, 908080, 1010239, 1816160, 2020478, 4040956, 5051195, 8081912, 10102390, 16163824, 20204780, 32327648, 40409560, 80819120, 161638240]

約数ペア:

[(1, 161638240), (2, 80819120), (4, 40409560), (5, 32327648), (8, 20204780), (10, 16163824), (16, 10102390), (20, 8081912), (32, 5051195), (40, 4040956), (80, 2020478), (89, 1816160), (160, 1010239), (178, 908080), (356, 454040), (445, 363232), (712, 227020), (890, 181616), (1424, 113510), (1780, 90808), (2848, 56755), (3560, 45404), (7120, 22702), (11351, 14240)]