20213505

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{109}}^1\times {\mathrm{317}}^1$

素因数の和:450

約数の個数: 48

約数和(自身を含む): 38198160

約数和(自身を除く): 17984655

約数列:

[1, 3, 5, 9, 13, 15, 39, 45, 65, 109, 117, 195, 317, 327, 545, 585, 951, 981, 1417, 1585, 1635, 2853, 4121, 4251, 4755, 4905, 7085, 12363, 12753, 14265, 20605, 21255, 34553, 37089, 61815, 63765, 103659, 172765, 185445, 310977, 449189, 518295, 1347567, 1554885, 2245945, 4042701, 6737835, 20213505]

約数ペア:

[(1, 20213505), (3, 6737835), (5, 4042701), (9, 2245945), (13, 1554885), (15, 1347567), (39, 518295), (45, 449189), (65, 310977), (109, 185445), (117, 172765), (195, 103659), (317, 63765), (327, 61815), (545, 37089), (585, 34553), (951, 21255), (981, 20605), (1417, 14265), (1585, 12753), (1635, 12363), (2853, 7085), (4121, 4905), (4251, 4755)]