20717460

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{179}}^1\times {\mathrm{643}}^1$

素因数の和:837

約数の個数: 72

約数和(自身を含む): 63292320

約数和(自身を除く): 42574860

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 179, 180, 358, 537, 643, 716, 895, 1074, 1286, 1611, 1790, 1929, 2148, 2572, 2685, 3215, 3222, 3580, 3858, 5370, 5787, 6430, 6444, 7716, 8055, 9645, 10740, 11574, 12860, 16110, 19290, 23148, 28935, 32220, 38580, 57870, 115097, 115740, 230194, 345291, 460388, 575485, 690582, 1035873, 1150970, 1381164, 1726455, 2071746, 2301940, 3452910, 4143492, 5179365, 6905820, 10358730, 20717460]

約数ペア:

[(1, 20717460), (2, 10358730), (3, 6905820), (4, 5179365), (5, 4143492), (6, 3452910), (9, 2301940), (10, 2071746), (12, 1726455), (15, 1381164), (18, 1150970), (20, 1035873), (30, 690582), (36, 575485), (45, 460388), (60, 345291), (90, 230194), (179, 115740), (180, 115097), (358, 57870), (537, 38580), (643, 32220), (716, 28935), (895, 23148), (1074, 19290), (1286, 16110), (1611, 12860), (1790, 11574), (1929, 10740), (2148, 9645), (2572, 8055), (2685, 7716), (3215, 6444), (3222, 6430), (3580, 5787), (3858, 5370)]