21287028

素因数分解:

$2^2\times 3^1\times 7^1\times {\mathrm{253417}}^1$

素因数の和:253431

約数の個数: 24

約数和(自身を含む): 56765632

約数和(自身を除く): 35478604

約数列:

[1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 42, 84, 253417, 506834, 760251, 1013668, 1520502, 1773919, 3041004, 3547838, 5321757, 7095676, 10643514, 21287028]

約数ペア:

[(1, 21287028), (2, 10643514), (3, 7095676), (4, 5321757), (6, 3547838), (7, 3041004), (12, 1773919), (14, 1520502), (21, 1013668), (28, 760251), (42, 506834), (84, 253417)]