4000400

素因数分解:

$2^4\times 5^2\times {\mathrm{73}}^1\times {\mathrm{137}}^1$

素因数の和:228

約数の個数: 60

約数和(自身を含む): 9813732

約数和(自身を除く): 5813332

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 73, 80, 100, 137, 146, 200, 274, 292, 365, 400, 548, 584, 685, 730, 1096, 1168, 1370, 1460, 1825, 2192, 2740, 2920, 3425, 3650, 5480, 5840, 6850, 7300, 10001, 10960, 13700, 14600, 20002, 27400, 29200, 40004, 50005, 54800, 80008, 100010, 160016, 200020, 250025, 400040, 500050, 800080, 1000100, 2000200, 4000400]

約数ペア:

[(1, 4000400), (2, 2000200), (4, 1000100), (5, 800080), (8, 500050), (10, 400040), (16, 250025), (20, 200020), (25, 160016), (40, 100010), (50, 80008), (73, 54800), (80, 50005), (100, 40004), (137, 29200), (146, 27400), (200, 20002), (274, 14600), (292, 13700), (365, 10960), (400, 10001), (548, 7300), (584, 6850), (685, 5840), (730, 5480), (1096, 3650), (1168, 3425), (1370, 2920), (1460, 2740), (1825, 2192)]