278345720

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{89}}^1\times {\mathrm{1907}}^1$

素因数の和:2048

約数の個数: 64

約数和(自身を含む): 649101600

約数和(自身を除く): 370755880

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 89, 164, 178, 205, 328, 356, 410, 445, 712, 820, 890, 1640, 1780, 1907, 3560, 3649, 3814, 7298, 7628, 9535, 14596, 15256, 18245, 19070, 29192, 36490, 38140, 72980, 76280, 78187, 145960, 156374, 169723, 312748, 339446, 390935, 625496, 678892, 781870, 848615, 1357784, 1563740, 1697230, 3127480, 3394460, 6788920, 6958643, 13917286, 27834572, 34793215, 55669144, 69586430, 139172860, 278345720]

約数ペア:

[(1, 278345720), (2, 139172860), (4, 69586430), (5, 55669144), (8, 34793215), (10, 27834572), (20, 13917286), (40, 6958643), (41, 6788920), (82, 3394460), (89, 3127480), (164, 1697230), (178, 1563740), (205, 1357784), (328, 848615), (356, 781870), (410, 678892), (445, 625496), (712, 390935), (820, 339446), (890, 312748), (1640, 169723), (1780, 156374), (1907, 145960), (3560, 78187), (3649, 76280), (3814, 72980), (7298, 38140), (7628, 36490), (9535, 29192), (14596, 19070), (15256, 18245)]