20705100

素因数分解:

$2^2\times 3^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{5309}}^1$

素因数の和:5339

約数の個数: 72

約数和(自身を含む): 64527120

約数和(自身を除く): 43822020

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 25, 26, 30, 39, 50, 52, 60, 65, 75, 78, 100, 130, 150, 156, 195, 260, 300, 325, 390, 650, 780, 975, 1300, 1950, 3900, 5309, 10618, 15927, 21236, 26545, 31854, 53090, 63708, 69017, 79635, 106180, 132725, 138034, 159270, 207051, 265450, 276068, 318540, 345085, 398175, 414102, 530900, 690170, 796350, 828204, 1035255, 1380340, 1592700, 1725425, 2070510, 3450850, 4141020, 5176275, 6901700, 10352550, 20705100]

約数ペア:

[(1, 20705100), (2, 10352550), (3, 6901700), (4, 5176275), (5, 4141020), (6, 3450850), (10, 2070510), (12, 1725425), (13, 1592700), (15, 1380340), (20, 1035255), (25, 828204), (26, 796350), (30, 690170), (39, 530900), (50, 414102), (52, 398175), (60, 345085), (65, 318540), (75, 276068), (78, 265450), (100, 207051), (130, 159270), (150, 138034), (156, 132725), (195, 106180), (260, 79635), (300, 69017), (325, 63708), (390, 53090), (650, 31854), (780, 26545), (975, 21236), (1300, 15927), (1950, 10618), (3900, 5309)]