21120555

素因数分解:

$3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{2111}}^1$

素因数の和:2171

約数の個数: 32

約数和(自身を含む): 36495360

約数和(自身を除く): 15374805

約数列:

[1, 3, 5, 15, 23, 29, 69, 87, 115, 145, 345, 435, 667, 2001, 2111, 3335, 6333, 10005, 10555, 31665, 48553, 61219, 145659, 183657, 242765, 306095, 728295, 918285, 1408037, 4224111, 7040185, 21120555]

約数ペア:

[(1, 21120555), (3, 7040185), (5, 4224111), (15, 1408037), (23, 918285), (29, 728295), (69, 306095), (87, 242765), (115, 183657), (145, 145659), (345, 61219), (435, 48553), (667, 31665), (2001, 10555), (2111, 10005), (3335, 6333)]