638560

素因数分解:

$2^5\times 5^1\times {\mathrm{13}}^1\times {\mathrm{307}}^1$

素因数の和:335

約数の個数: 48

約数和(自身を含む): 1629936

約数和(自身を除く): 991376

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 65, 80, 104, 130, 160, 208, 260, 307, 416, 520, 614, 1040, 1228, 1535, 2080, 2456, 3070, 3991, 4912, 6140, 7982, 9824, 12280, 15964, 19955, 24560, 31928, 39910, 49120, 63856, 79820, 127712, 159640, 319280, 638560]

約数ペア:

[(1, 638560), (2, 319280), (4, 159640), (5, 127712), (8, 79820), (10, 63856), (13, 49120), (16, 39910), (20, 31928), (26, 24560), (32, 19955), (40, 15964), (52, 12280), (65, 9824), (80, 7982), (104, 6140), (130, 4912), (160, 3991), (208, 3070), (260, 2456), (307, 2080), (416, 1535), (520, 1228), (614, 1040)]