257778780

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{613759}}^1$

素因数の和:613778

約数の個数: 48

約数和(自身を含む): 824893440

約数和(自身を除く): 567114660

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420, 613759, 1227518, 1841277, 2455036, 3068795, 3682554, 4296313, 6137590, 7365108, 8592626, 9206385, 12275180, 12888939, 17185252, 18412770, 21481565, 25777878, 36825540, 42963130, 51555756, 64444695, 85926260, 128889390, 257778780]

約数ペア:

[(1, 257778780), (2, 128889390), (3, 85926260), (4, 64444695), (5, 51555756), (6, 42963130), (7, 36825540), (10, 25777878), (12, 21481565), (14, 18412770), (15, 17185252), (20, 12888939), (21, 12275180), (28, 9206385), (30, 8592626), (35, 7365108), (42, 6137590), (60, 4296313), (70, 3682554), (84, 3068795), (105, 2455036), (140, 1841277), (210, 1227518), (420, 613759)]