128942720

素因数分解:

$2^7\times 5^1\times {\mathrm{201473}}^1$

素因数の和:201492

約数の個数: 32

約数和(自身を含む): 308255220

約数和(自身を除く): 179312500

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 201473, 402946, 805892, 1007365, 1611784, 2014730, 3223568, 4029460, 6447136, 8058920, 12894272, 16117840, 25788544, 32235680, 64471360, 128942720]

約数ペア:

[(1, 128942720), (2, 64471360), (4, 32235680), (5, 25788544), (8, 16117840), (10, 12894272), (16, 8058920), (20, 6447136), (32, 4029460), (40, 3223568), (64, 2014730), (80, 1611784), (128, 1007365), (160, 805892), (320, 402946), (640, 201473)]