12782720

素因数分解:

$2^7\times 5^1\times {\mathrm{19973}}^1$

素因数の和:19992

約数の個数: 32

約数和(自身を含む): 30560220

約数和(自身を除く): 17777500

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 19973, 39946, 79892, 99865, 159784, 199730, 319568, 399460, 639136, 798920, 1278272, 1597840, 2556544, 3195680, 6391360, 12782720]

約数ペア:

[(1, 12782720), (2, 6391360), (4, 3195680), (5, 2556544), (8, 1597840), (10, 1278272), (16, 798920), (20, 639136), (32, 399460), (40, 319568), (64, 199730), (80, 159784), (128, 99865), (160, 79892), (320, 39946), (640, 19973)]