20850400

素因数分解:

$2^5\times 5^2\times {\mathrm{67}}^1\times {\mathrm{389}}^1$

素因数の和:476

約数の個数: 72

約数和(自身を含む): 51793560

約数和(自身を除く): 30943160

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 67, 80, 100, 134, 160, 200, 268, 335, 389, 400, 536, 670, 778, 800, 1072, 1340, 1556, 1675, 1945, 2144, 2680, 3112, 3350, 3890, 5360, 6224, 6700, 7780, 9725, 10720, 12448, 13400, 15560, 19450, 26063, 26800, 31120, 38900, 52126, 53600, 62240, 77800, 104252, 130315, 155600, 208504, 260630, 311200, 417008, 521260, 651575, 834016, 1042520, 1303150, 2085040, 2606300, 4170080, 5212600, 10425200, 20850400]

約数ペア:

[(1, 20850400), (2, 10425200), (4, 5212600), (5, 4170080), (8, 2606300), (10, 2085040), (16, 1303150), (20, 1042520), (25, 834016), (32, 651575), (40, 521260), (50, 417008), (67, 311200), (80, 260630), (100, 208504), (134, 155600), (160, 130315), (200, 104252), (268, 77800), (335, 62240), (389, 53600), (400, 52126), (536, 38900), (670, 31120), (778, 26800), (800, 26063), (1072, 19450), (1340, 15560), (1556, 13400), (1675, 12448), (1945, 10720), (2144, 9725), (2680, 7780), (3112, 6700), (3350, 6224), (3890, 5360)]