16000420

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^2\times {\mathrm{101}}^1$

素因数の和:288

約数の個数: 36

約数和(自身を含む): 34319124

約数和(自身を除く): 18318704

約数列:

[1, 2, 4, 5, 10, 20, 89, 101, 178, 202, 356, 404, 445, 505, 890, 1010, 1780, 2020, 7921, 8989, 15842, 17978, 31684, 35956, 39605, 44945, 79210, 89890, 158420, 179780, 800021, 1600042, 3200084, 4000105, 8000210, 16000420]

約数ペア:

[(1, 16000420), (2, 8000210), (4, 4000105), (5, 3200084), (10, 1600042), (20, 800021), (89, 179780), (101, 158420), (178, 89890), (202, 79210), (356, 44945), (404, 39605), (445, 35956), (505, 31684), (890, 17978), (1010, 15842), (1780, 8989), (2020, 7921)]