19810263220

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{101}}^1\times {\mathrm{891551}}^1$

素因数の和:891672

約数の個数: 48

約数和(自身を含む): 45832905216

約数和(自身を除く): 26022641996

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 101, 110, 202, 220, 404, 505, 1010, 1111, 2020, 2222, 4444, 5555, 11110, 22220, 891551, 1783102, 3566204, 4457755, 8915510, 9807061, 17831020, 19614122, 39228244, 49035305, 90046651, 98070610, 180093302, 196141220, 360186604, 450233255, 900466510, 990513161, 1800933020, 1981026322, 3962052644, 4952565805, 9905131610, 19810263220]

約数ペア:

[(1, 19810263220), (2, 9905131610), (4, 4952565805), (5, 3962052644), (10, 1981026322), (11, 1800933020), (20, 990513161), (22, 900466510), (44, 450233255), (55, 360186604), (101, 196141220), (110, 180093302), (202, 98070610), (220, 90046651), (404, 49035305), (505, 39228244), (1010, 19614122), (1111, 17831020), (2020, 9807061), (2222, 8915510), (4444, 4457755), (5555, 3566204), (11110, 1783102), (22220, 891551)]