1639206820

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{179}}^1\times {\mathrm{6449}}^1$

素因数の和:6708

約数の個数: 48

約数和(自身を含む): 3510864000

約数和(自身を除く): 1871657180

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 179, 284, 355, 358, 710, 716, 895, 1420, 1790, 3580, 6449, 12709, 12898, 25418, 25796, 32245, 50836, 63545, 64490, 127090, 128980, 254180, 457879, 915758, 1154371, 1831516, 2289395, 2308742, 4578790, 4617484, 5771855, 9157580, 11543710, 23087420, 81960341, 163920682, 327841364, 409801705, 819603410, 1639206820]

約数ペア:

[(1, 1639206820), (2, 819603410), (4, 409801705), (5, 327841364), (10, 163920682), (20, 81960341), (71, 23087420), (142, 11543710), (179, 9157580), (284, 5771855), (355, 4617484), (358, 4578790), (710, 2308742), (716, 2289395), (895, 1831516), (1420, 1154371), (1790, 915758), (3580, 457879), (6449, 254180), (12709, 128980), (12898, 127090), (25418, 64490), (25796, 63545), (32245, 50836)]