421760

素因数分解:

$2^7\times 5^1\times {\mathrm{659}}^1$

素因数の和:678

約数の個数: 32

約数和(自身を含む): 1009800

約数和(自身を除く): 588040

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 659, 1318, 2636, 3295, 5272, 6590, 10544, 13180, 21088, 26360, 42176, 52720, 84352, 105440, 210880, 421760]

約数ペア:

[(1, 421760), (2, 210880), (4, 105440), (5, 84352), (8, 52720), (10, 42176), (16, 26360), (20, 21088), (32, 13180), (40, 10544), (64, 6590), (80, 5272), (128, 3295), (160, 2636), (320, 1318), (640, 659)]