19968235

素因数分解:

$5^1\times 7^2\times {\mathrm{149}}^1\times {\mathrm{547}}^1$

素因数の和:715

約数の個数: 24

約数和(自身を含む): 28112400

約数和(自身を除く): 8144165

約数列:

[1, 5, 7, 35, 49, 149, 245, 547, 745, 1043, 2735, 3829, 5215, 7301, 19145, 26803, 36505, 81503, 134015, 407515, 570521, 2852605, 3993647, 19968235]

約数ペア:

[(1, 19968235), (5, 3993647), (7, 2852605), (35, 570521), (49, 407515), (149, 134015), (245, 81503), (547, 36505), (745, 26803), (1043, 19145), (2735, 7301), (3829, 5215)]