18781490

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{20639}}^1$

素因数の和:20666

約数の個数: 32

約数和(自身を含む): 41610240

約数和(自身を除く): 22828750

約数列:

[1, 2, 5, 7, 10, 13, 14, 26, 35, 65, 70, 91, 130, 182, 455, 910, 20639, 41278, 103195, 144473, 206390, 268307, 288946, 536614, 722365, 1341535, 1444730, 1878149, 2683070, 3756298, 9390745, 18781490]

約数ペア:

[(1, 18781490), (2, 9390745), (5, 3756298), (7, 2683070), (10, 1878149), (13, 1444730), (14, 1341535), (26, 722365), (35, 536614), (65, 288946), (70, 268307), (91, 206390), (130, 144473), (182, 103195), (455, 41278), (910, 20639)]