812500

素因数分解:

$2^2\times 5^6\times {\mathrm{13}}^1$

素因数の和:47

約数の個数: 42

約数和(自身を含む): 1914038

約数和(自身を除く): 1101538

約数列:

[1, 2, 4, 5, 10, 13, 20, 25, 26, 50, 52, 65, 100, 125, 130, 250, 260, 325, 500, 625, 650, 1250, 1300, 1625, 2500, 3125, 3250, 6250, 6500, 8125, 12500, 15625, 16250, 31250, 32500, 40625, 62500, 81250, 162500, 203125, 406250, 812500]

約数ペア:

[(1, 812500), (2, 406250), (4, 203125), (5, 162500), (10, 81250), (13, 62500), (20, 40625), (25, 32500), (26, 31250), (50, 16250), (52, 15625), (65, 12500), (100, 8125), (125, 6500), (130, 6250), (250, 3250), (260, 3125), (325, 2500), (500, 1625), (625, 1300), (650, 1250)]