12813440

素因数分解:

$2^7\times 5^1\times {\mathrm{20021}}^1$

素因数の和:20040

約数の個数: 32

約数和(自身を含む): 30633660

約数和(自身を除く): 17820220

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 20021, 40042, 80084, 100105, 160168, 200210, 320336, 400420, 640672, 800840, 1281344, 1601680, 2562688, 3203360, 6406720, 12813440]

約数ペア:

[(1, 12813440), (2, 6406720), (4, 3203360), (5, 2562688), (8, 1601680), (10, 1281344), (16, 800840), (20, 640672), (32, 400420), (40, 320336), (64, 200210), (80, 160168), (128, 100105), (160, 80084), (320, 40042), (640, 20021)]