18337880

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{587}}^1$

素因数の和:680

約数の個数: 64

約数和(自身を含む): 45722880

約数和(自身を除く): 27385000

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 71, 88, 110, 142, 220, 284, 355, 440, 568, 587, 710, 781, 1174, 1420, 1562, 2348, 2840, 2935, 3124, 3905, 4696, 5870, 6248, 6457, 7810, 11740, 12914, 15620, 23480, 25828, 31240, 32285, 41677, 51656, 64570, 83354, 129140, 166708, 208385, 258280, 333416, 416770, 458447, 833540, 916894, 1667080, 1833788, 2292235, 3667576, 4584470, 9168940, 18337880]

約数ペア:

[(1, 18337880), (2, 9168940), (4, 4584470), (5, 3667576), (8, 2292235), (10, 1833788), (11, 1667080), (20, 916894), (22, 833540), (40, 458447), (44, 416770), (55, 333416), (71, 258280), (88, 208385), (110, 166708), (142, 129140), (220, 83354), (284, 64570), (355, 51656), (440, 41677), (568, 32285), (587, 31240), (710, 25828), (781, 23480), (1174, 15620), (1420, 12914), (1562, 11740), (2348, 7810), (2840, 6457), (2935, 6248), (3124, 5870), (3905, 4696)]