12812500

素因数分解:

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

素因数の和:80

約数の個数: 48

約数和(自身を含む): 28710864

約数和(自身を除く): 15898364

約数列:

[1, 2, 4, 5, 10, 20, 25, 41, 50, 82, 100, 125, 164, 205, 250, 410, 500, 625, 820, 1025, 1250, 2050, 2500, 3125, 4100, 5125, 6250, 10250, 12500, 15625, 20500, 25625, 31250, 51250, 62500, 78125, 102500, 128125, 156250, 256250, 312500, 512500, 640625, 1281250, 2562500, 3203125, 6406250, 12812500]

約数ペア:

[(1, 12812500), (2, 6406250), (4, 3203125), (5, 2562500), (10, 1281250), (20, 640625), (25, 512500), (41, 312500), (50, 256250), (82, 156250), (100, 128125), (125, 102500), (164, 78125), (205, 62500), (250, 51250), (410, 31250), (500, 25625), (625, 20500), (820, 15625), (1025, 12500), (1250, 10250), (2050, 6250), (2500, 5125), (3125, 4100)]