21254065

素因数分解:

$5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{1031}}^1$

素因数の和:1093

約数の個数: 32

約数和(自身を含む): 31703040

約数和(自身を除く): 10448975

約数列:

[1, 5, 7, 19, 31, 35, 95, 133, 155, 217, 589, 665, 1031, 1085, 2945, 4123, 5155, 7217, 19589, 20615, 31961, 36085, 97945, 137123, 159805, 223727, 607259, 685615, 1118635, 3036295, 4250813, 21254065]

約数ペア:

[(1, 21254065), (5, 4250813), (7, 3036295), (19, 1118635), (31, 685615), (35, 607259), (95, 223727), (133, 159805), (155, 137123), (217, 97945), (589, 36085), (665, 31961), (1031, 20615), (1085, 19589), (2945, 7217), (4123, 5155)]