1640000

素因数分解:

$2^6\times 5^4\times {\mathrm{41}}^1$

素因数の和:73

約数の個数: 70

約数和(自身を含む): 4165854

約数和(自身を除く): 2525854

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 41, 50, 64, 80, 82, 100, 125, 160, 164, 200, 205, 250, 320, 328, 400, 410, 500, 625, 656, 800, 820, 1000, 1025, 1250, 1312, 1600, 1640, 2000, 2050, 2500, 2624, 3280, 4000, 4100, 5000, 5125, 6560, 8000, 8200, 10000, 10250, 13120, 16400, 20000, 20500, 25625, 32800, 40000, 41000, 51250, 65600, 82000, 102500, 164000, 205000, 328000, 410000, 820000, 1640000]

約数ペア:

[(1, 1640000), (2, 820000), (4, 410000), (5, 328000), (8, 205000), (10, 164000), (16, 102500), (20, 82000), (25, 65600), (32, 51250), (40, 41000), (41, 40000), (50, 32800), (64, 25625), (80, 20500), (82, 20000), (100, 16400), (125, 13120), (160, 10250), (164, 10000), (200, 8200), (205, 8000), (250, 6560), (320, 5125), (328, 5000), (400, 4100), (410, 4000), (500, 3280), (625, 2624), (656, 2500), (800, 2050), (820, 2000), (1000, 1640), (1025, 1600), (1250, 1312)]