128237440

素因数分解:

$2^7\times 5^1\times {\mathrm{200371}}^1$

素因数の和:200390

約数の個数: 32

約数和(自身を含む): 306569160

約数和(自身を除く): 178331720

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 200371, 400742, 801484, 1001855, 1602968, 2003710, 3205936, 4007420, 6411872, 8014840, 12823744, 16029680, 25647488, 32059360, 64118720, 128237440]

約数ペア:

[(1, 128237440), (2, 64118720), (4, 32059360), (5, 25647488), (8, 16029680), (10, 12823744), (16, 8014840), (20, 6411872), (32, 4007420), (40, 3205936), (64, 2003710), (80, 1602968), (128, 1001855), (160, 801484), (320, 400742), (640, 200371)]