5125000

素因数分解:

$2^3\times 5^6\times {\mathrm{41}}^1$

素因数の和:77

約数の個数: 56

約数和(自身を含む): 12304530

約数和(自身を除く): 7179530

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 41, 50, 82, 100, 125, 164, 200, 205, 250, 328, 410, 500, 625, 820, 1000, 1025, 1250, 1640, 2050, 2500, 3125, 4100, 5000, 5125, 6250, 8200, 10250, 12500, 15625, 20500, 25000, 25625, 31250, 41000, 51250, 62500, 102500, 125000, 128125, 205000, 256250, 512500, 640625, 1025000, 1281250, 2562500, 5125000]

約数ペア:

[(1, 5125000), (2, 2562500), (4, 1281250), (5, 1025000), (8, 640625), (10, 512500), (20, 256250), (25, 205000), (40, 128125), (41, 125000), (50, 102500), (82, 62500), (100, 51250), (125, 41000), (164, 31250), (200, 25625), (205, 25000), (250, 20500), (328, 15625), (410, 12500), (500, 10250), (625, 8200), (820, 6250), (1000, 5125), (1025, 5000), (1250, 4100), (1640, 3125), (2050, 2500)]