20011660

素因数分解:

$2^2\times 5^1\times {\mathrm{47}}^1\times {\mathrm{61}}^1\times {\mathrm{349}}^1$

素因数の和:466

約数の個数: 48

約数和(自身を含む): 43747200

約数和(自身を除く): 23735540

約数列:

[1, 2, 4, 5, 10, 20, 47, 61, 94, 122, 188, 235, 244, 305, 349, 470, 610, 698, 940, 1220, 1396, 1745, 2867, 3490, 5734, 6980, 11468, 14335, 16403, 21289, 28670, 32806, 42578, 57340, 65612, 82015, 85156, 106445, 164030, 212890, 328060, 425780, 1000583, 2001166, 4002332, 5002915, 10005830, 20011660]

約数ペア:

[(1, 20011660), (2, 10005830), (4, 5002915), (5, 4002332), (10, 2001166), (20, 1000583), (47, 425780), (61, 328060), (94, 212890), (122, 164030), (188, 106445), (235, 85156), (244, 82015), (305, 65612), (349, 57340), (470, 42578), (610, 32806), (698, 28670), (940, 21289), (1220, 16403), (1396, 14335), (1745, 11468), (2867, 6980), (3490, 5734)]