845000

素因数分解:

$2^3\times 5^4\times {\mathrm{13}}^2$

素因数の和:52

約数の個数: 60

約数和(自身を含む): 2143845

約数和(自身を除く): 1298845

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 25, 26, 40, 50, 52, 65, 100, 104, 125, 130, 169, 200, 250, 260, 325, 338, 500, 520, 625, 650, 676, 845, 1000, 1250, 1300, 1352, 1625, 1690, 2500, 2600, 3250, 3380, 4225, 5000, 6500, 6760, 8125, 8450, 13000, 16250, 16900, 21125, 32500, 33800, 42250, 65000, 84500, 105625, 169000, 211250, 422500, 845000]

約数ペア:

[(1, 845000), (2, 422500), (4, 211250), (5, 169000), (8, 105625), (10, 84500), (13, 65000), (20, 42250), (25, 33800), (26, 32500), (40, 21125), (50, 16900), (52, 16250), (65, 13000), (100, 8450), (104, 8125), (125, 6760), (130, 6500), (169, 5000), (200, 4225), (250, 3380), (260, 3250), (325, 2600), (338, 2500), (500, 1690), (520, 1625), (625, 1352), (650, 1300), (676, 1250), (845, 1000)]