21315195

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^2\times {\mathrm{149}}^1$

素因数の和:205

約数の個数: 72

約数和(自身を含む): 43102800

約数和(自身を除く): 21787605

約数列:

[1, 3, 5, 9, 11, 15, 17, 33, 45, 51, 55, 85, 99, 149, 153, 165, 187, 255, 289, 447, 495, 561, 745, 765, 867, 935, 1341, 1445, 1639, 1683, 2235, 2533, 2601, 2805, 3179, 4335, 4917, 6705, 7599, 8195, 8415, 9537, 12665, 13005, 14751, 15895, 22797, 24585, 27863, 28611, 37995, 43061, 47685, 73755, 83589, 113985, 129183, 139315, 143055, 215305, 250767, 387549, 417945, 473671, 645915, 1253835, 1421013, 1937745, 2368355, 4263039, 7105065, 21315195]

約数ペア:

[(1, 21315195), (3, 7105065), (5, 4263039), (9, 2368355), (11, 1937745), (15, 1421013), (17, 1253835), (33, 645915), (45, 473671), (51, 417945), (55, 387549), (85, 250767), (99, 215305), (149, 143055), (153, 139315), (165, 129183), (187, 113985), (255, 83589), (289, 73755), (447, 47685), (495, 43061), (561, 37995), (745, 28611), (765, 27863), (867, 24585), (935, 22797), (1341, 15895), (1445, 14751), (1639, 13005), (1683, 12665), (2235, 9537), (2533, 8415), (2601, 8195), (2805, 7599), (3179, 6705), (4335, 4917)]