19876120

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{199}}^1\times {\mathrm{227}}^1$

素因数の和:448

約数の個数: 64

約数和(自身を含む): 49248000

約数和(自身を除く): 29371880

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 199, 220, 227, 398, 440, 454, 796, 908, 995, 1135, 1592, 1816, 1990, 2189, 2270, 2497, 3980, 4378, 4540, 4994, 7960, 8756, 9080, 9988, 10945, 12485, 17512, 19976, 21890, 24970, 43780, 45173, 49940, 87560, 90346, 99880, 180692, 225865, 361384, 451730, 496903, 903460, 993806, 1806920, 1987612, 2484515, 3975224, 4969030, 9938060, 19876120]

約数ペア:

[(1, 19876120), (2, 9938060), (4, 4969030), (5, 3975224), (8, 2484515), (10, 1987612), (11, 1806920), (20, 993806), (22, 903460), (40, 496903), (44, 451730), (55, 361384), (88, 225865), (110, 180692), (199, 99880), (220, 90346), (227, 87560), (398, 49940), (440, 45173), (454, 43780), (796, 24970), (908, 21890), (995, 19976), (1135, 17512), (1592, 12485), (1816, 10945), (1990, 9988), (2189, 9080), (2270, 8756), (2497, 7960), (3980, 4994), (4378, 4540)]