19781985

素因数分解:

$3^1\times 5^1\times {\mathrm{53}}^1\times {\mathrm{149}}^1\times {\mathrm{167}}^1$

素因数の和:377

約数の個数: 32

約数和(自身を含む): 32659200

約数和(自身を除く): 12877215

約数列:

[1, 3, 5, 15, 53, 149, 159, 167, 265, 447, 501, 745, 795, 835, 2235, 2505, 7897, 8851, 23691, 24883, 26553, 39485, 44255, 74649, 118455, 124415, 132765, 373245, 1318799, 3956397, 6593995, 19781985]

約数ペア:

[(1, 19781985), (3, 6593995), (5, 3956397), (15, 1318799), (53, 373245), (149, 132765), (159, 124415), (167, 118455), (265, 74649), (447, 44255), (501, 39485), (745, 26553), (795, 24883), (835, 23691), (2235, 8851), (2505, 7897)]