18371990

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{13}}^2\times {\mathrm{1553}}^1$

素因数の和:1593

約数の個数: 48

約数和(自身を含む): 40951008

約数和(自身を除く): 22579018

約数列:

[1, 2, 5, 7, 10, 13, 14, 26, 35, 65, 70, 91, 130, 169, 182, 338, 455, 845, 910, 1183, 1553, 1690, 2366, 3106, 5915, 7765, 10871, 11830, 15530, 20189, 21742, 40378, 54355, 100945, 108710, 141323, 201890, 262457, 282646, 524914, 706615, 1312285, 1413230, 1837199, 2624570, 3674398, 9185995, 18371990]

約数ペア:

[(1, 18371990), (2, 9185995), (5, 3674398), (7, 2624570), (10, 1837199), (13, 1413230), (14, 1312285), (26, 706615), (35, 524914), (65, 282646), (70, 262457), (91, 201890), (130, 141323), (169, 108710), (182, 100945), (338, 54355), (455, 40378), (845, 21742), (910, 20189), (1183, 15530), (1553, 11830), (1690, 10871), (2366, 7765), (3106, 5915)]