21980180

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{71}}^1\times {\mathrm{673}}^1$

素因数の和:776

約数の個数: 48

約数和(自身を含む): 48916224

約数和(自身を除く): 26936044

約数列:

[1, 2, 4, 5, 10, 20, 23, 46, 71, 92, 115, 142, 230, 284, 355, 460, 673, 710, 1346, 1420, 1633, 2692, 3266, 3365, 6532, 6730, 8165, 13460, 15479, 16330, 30958, 32660, 47783, 61916, 77395, 95566, 154790, 191132, 238915, 309580, 477830, 955660, 1099009, 2198018, 4396036, 5495045, 10990090, 21980180]

約数ペア:

[(1, 21980180), (2, 10990090), (4, 5495045), (5, 4396036), (10, 2198018), (20, 1099009), (23, 955660), (46, 477830), (71, 309580), (92, 238915), (115, 191132), (142, 154790), (230, 95566), (284, 77395), (355, 61916), (460, 47783), (673, 32660), (710, 30958), (1346, 16330), (1420, 15479), (1633, 13460), (2692, 8165), (3266, 6730), (3365, 6532)]