1690000

素因数分解:

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

素因数の和:54

約数の個数: 75

約数和(自身を含む): 4430613

約数和(自身を除く): 2740613

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 25, 26, 40, 50, 52, 65, 80, 100, 104, 125, 130, 169, 200, 208, 250, 260, 325, 338, 400, 500, 520, 625, 650, 676, 845, 1000, 1040, 1250, 1300, 1352, 1625, 1690, 2000, 2500, 2600, 2704, 3250, 3380, 4225, 5000, 5200, 6500, 6760, 8125, 8450, 10000, 13000, 13520, 16250, 16900, 21125, 26000, 32500, 33800, 42250, 65000, 67600, 84500, 105625, 130000, 169000, 211250, 338000, 422500, 845000, 1690000]

約数ペア:

[(1, 1690000), (2, 845000), (4, 422500), (5, 338000), (8, 211250), (10, 169000), (13, 130000), (16, 105625), (20, 84500), (25, 67600), (26, 65000), (40, 42250), (50, 33800), (52, 32500), (65, 26000), (80, 21125), (100, 16900), (104, 16250), (125, 13520), (130, 13000), (169, 10000), (200, 8450), (208, 8125), (250, 6760), (260, 6500), (325, 5200), (338, 5000), (400, 4225), (500, 3380), (520, 3250), (625, 2704), (650, 2600), (676, 2500), (845, 2000), (1000, 1690), (1040, 1625), (1250, 1352)]