28007860

素因数分解:

$2^2\times 5^1\times {\mathrm{257}}^1\times {\mathrm{5449}}^1$

素因数の和:5715

約数の個数: 24

約数和(自身を含む): 59056200

約数和(自身を除く): 31048340

約数列:

[1, 2, 4, 5, 10, 20, 257, 514, 1028, 1285, 2570, 5140, 5449, 10898, 21796, 27245, 54490, 108980, 1400393, 2800786, 5601572, 7001965, 14003930, 28007860]

約数ペア:

[(1, 28007860), (2, 14003930), (4, 7001965), (5, 5601572), (10, 2800786), (20, 1400393), (257, 108980), (514, 54490), (1028, 27245), (1285, 21796), (2570, 10898), (5140, 5449)]