12639980

素因数分解:

$2^2\times 5^1\times {\mathrm{619}}^1\times {\mathrm{1021}}^1$

素因数の和:1649

約数の個数: 24

約数和(自身を含む): 26612880

約数和(自身を除く): 13972900

約数列:

[1, 2, 4, 5, 10, 20, 619, 1021, 1238, 2042, 2476, 3095, 4084, 5105, 6190, 10210, 12380, 20420, 631999, 1263998, 2527996, 3159995, 6319990, 12639980]

約数ペア:

[(1, 12639980), (2, 6319990), (4, 3159995), (5, 2527996), (10, 1263998), (20, 631999), (619, 20420), (1021, 12380), (1238, 10210), (2042, 6190), (2476, 5105), (3095, 4084)]