656000

素因数分解:

$2^7\times 5^3\times {\mathrm{41}}^1$

素因数の和:70

約数の個数: 64

約数和(自身を含む): 1670760

約数和(自身を除く): 1014760

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 41, 50, 64, 80, 82, 100, 125, 128, 160, 164, 200, 205, 250, 320, 328, 400, 410, 500, 640, 656, 800, 820, 1000, 1025, 1312, 1600, 1640, 2000, 2050, 2624, 3200, 3280, 4000, 4100, 5125, 5248, 6560, 8000, 8200, 10250, 13120, 16000, 16400, 20500, 26240, 32800, 41000, 65600, 82000, 131200, 164000, 328000, 656000]

約数ペア:

[(1, 656000), (2, 328000), (4, 164000), (5, 131200), (8, 82000), (10, 65600), (16, 41000), (20, 32800), (25, 26240), (32, 20500), (40, 16400), (41, 16000), (50, 13120), (64, 10250), (80, 8200), (82, 8000), (100, 6560), (125, 5248), (128, 5125), (160, 4100), (164, 4000), (200, 3280), (205, 3200), (250, 2624), (320, 2050), (328, 2000), (400, 1640), (410, 1600), (500, 1312), (640, 1025), (656, 1000), (800, 820)]