51250000

素因数分解:

$2^4\times 5^7\times {\mathrm{41}}^1$

素因数の和:84

約数の個数: 80

約数和(自身を含む): 127148112

約数和(自身を除く): 75898112

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 41, 50, 80, 82, 100, 125, 164, 200, 205, 250, 328, 400, 410, 500, 625, 656, 820, 1000, 1025, 1250, 1640, 2000, 2050, 2500, 3125, 3280, 4100, 5000, 5125, 6250, 8200, 10000, 10250, 12500, 15625, 16400, 20500, 25000, 25625, 31250, 41000, 50000, 51250, 62500, 78125, 82000, 102500, 125000, 128125, 156250, 205000, 250000, 256250, 312500, 410000, 512500, 625000, 640625, 1025000, 1250000, 1281250, 2050000, 2562500, 3203125, 5125000, 6406250, 10250000, 12812500, 25625000, 51250000]

約数ペア:

[(1, 51250000), (2, 25625000), (4, 12812500), (5, 10250000), (8, 6406250), (10, 5125000), (16, 3203125), (20, 2562500), (25, 2050000), (40, 1281250), (41, 1250000), (50, 1025000), (80, 640625), (82, 625000), (100, 512500), (125, 410000), (164, 312500), (200, 256250), (205, 250000), (250, 205000), (328, 156250), (400, 128125), (410, 125000), (500, 102500), (625, 82000), (656, 78125), (820, 62500), (1000, 51250), (1025, 50000), (1250, 41000), (1640, 31250), (2000, 25625), (2050, 25000), (2500, 20500), (3125, 16400), (3280, 15625), (4100, 12500), (5000, 10250), (5125, 10000), (6250, 8200)]