40804000

素因数分解:

$2^5\times 5^3\times {\mathrm{101}}^2$

素因数の和:227

約数の個数: 72

約数和(自身を含む): 101257884

約数和(自身を除く): 60453884

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 80, 100, 101, 125, 160, 200, 202, 250, 400, 404, 500, 505, 800, 808, 1000, 1010, 1616, 2000, 2020, 2525, 3232, 4000, 4040, 5050, 8080, 10100, 10201, 12625, 16160, 20200, 20402, 25250, 40400, 40804, 50500, 51005, 80800, 81608, 101000, 102010, 163216, 202000, 204020, 255025, 326432, 404000, 408040, 510050, 816080, 1020100, 1275125, 1632160, 2040200, 2550250, 4080400, 5100500, 8160800, 10201000, 20402000, 40804000]

約数ペア:

[(1, 40804000), (2, 20402000), (4, 10201000), (5, 8160800), (8, 5100500), (10, 4080400), (16, 2550250), (20, 2040200), (25, 1632160), (32, 1275125), (40, 1020100), (50, 816080), (80, 510050), (100, 408040), (101, 404000), (125, 326432), (160, 255025), (200, 204020), (202, 202000), (250, 163216), (400, 102010), (404, 101000), (500, 81608), (505, 80800), (800, 51005), (808, 50500), (1000, 40804), (1010, 40400), (1616, 25250), (2000, 20402), (2020, 20200), (2525, 16160), (3232, 12625), (4000, 10201), (4040, 10100), (5050, 8080)]