19981568

素因数分解:

$2^8\times {\mathrm{89}}^1\times {\mathrm{877}}^1$

素因数の和:982

約数の個数: 36

約数和(自身を含む): 40379220

約数和(自身を除く): 20397652

約数列:

[1, 2, 4, 8, 16, 32, 64, 89, 128, 178, 256, 356, 712, 877, 1424, 1754, 2848, 3508, 5696, 7016, 11392, 14032, 22784, 28064, 56128, 78053, 112256, 156106, 224512, 312212, 624424, 1248848, 2497696, 4995392, 9990784, 19981568]

約数ペア:

[(1, 19981568), (2, 9990784), (4, 4995392), (8, 2497696), (16, 1248848), (32, 624424), (64, 312212), (89, 224512), (128, 156106), (178, 112256), (256, 78053), (356, 56128), (712, 28064), (877, 22784), (1424, 14032), (1754, 11392), (2848, 7016), (3508, 5696)]