21565880

素因数分解:

$2^3\times 5^1\times 7^2\times {\mathrm{11003}}^1$

素因数の和:11028

約数の個数: 48

約数和(自身を含む): 56450520

約数和(自身を除く): 34884640

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 49, 56, 70, 98, 140, 196, 245, 280, 392, 490, 980, 1960, 11003, 22006, 44012, 55015, 77021, 88024, 110030, 154042, 220060, 308084, 385105, 440120, 539147, 616168, 770210, 1078294, 1540420, 2156588, 2695735, 3080840, 4313176, 5391470, 10782940, 21565880]

約数ペア:

[(1, 21565880), (2, 10782940), (4, 5391470), (5, 4313176), (7, 3080840), (8, 2695735), (10, 2156588), (14, 1540420), (20, 1078294), (28, 770210), (35, 616168), (40, 539147), (49, 440120), (56, 385105), (70, 308084), (98, 220060), (140, 154042), (196, 110030), (245, 88024), (280, 77021), (392, 55015), (490, 44012), (980, 22006), (1960, 11003)]