21810180

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{51929}}^1$

素因数の和:51948

約数の個数: 48

約数和(自身を含む): 69793920

約数和(自身を除く): 47983740

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420, 51929, 103858, 155787, 207716, 259645, 311574, 363503, 519290, 623148, 727006, 778935, 1038580, 1090509, 1454012, 1557870, 1817515, 2181018, 3115740, 3635030, 4362036, 5452545, 7270060, 10905090, 21810180]

約数ペア:

[(1, 21810180), (2, 10905090), (3, 7270060), (4, 5452545), (5, 4362036), (6, 3635030), (7, 3115740), (10, 2181018), (12, 1817515), (14, 1557870), (15, 1454012), (20, 1090509), (21, 1038580), (28, 778935), (30, 727006), (35, 623148), (42, 519290), (60, 363503), (70, 311574), (84, 259645), (105, 207716), (140, 155787), (210, 103858), (420, 51929)]