156890780

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{128599}}^1$

素因数の和:128669

約数の個数: 24

約数和(自身を含む): 334874400

約数和(自身を除く): 177983620

約数列:

[1, 2, 4, 5, 10, 20, 61, 122, 244, 305, 610, 1220, 128599, 257198, 514396, 642995, 1285990, 2571980, 7844539, 15689078, 31378156, 39222695, 78445390, 156890780]

約数ペア:

[(1, 156890780), (2, 78445390), (4, 39222695), (5, 31378156), (10, 15689078), (20, 7844539), (61, 2571980), (122, 1285990), (244, 642995), (305, 514396), (610, 257198), (1220, 128599)]