128420480

素因数分解:

$2^7\times 5^1\times {\mathrm{200657}}^1$

素因数の和:200676

約数の個数: 32

約数和(自身を含む): 307006740

約数和(自身を除く): 178586260

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 200657, 401314, 802628, 1003285, 1605256, 2006570, 3210512, 4013140, 6421024, 8026280, 12842048, 16052560, 25684096, 32105120, 64210240, 128420480]

約数ペア:

[(1, 128420480), (2, 64210240), (4, 32105120), (5, 25684096), (8, 16052560), (10, 12842048), (16, 8026280), (20, 6421024), (32, 4013140), (40, 3210512), (64, 2006570), (80, 1605256), (128, 1003285), (160, 802628), (320, 401314), (640, 200657)]