21155512

素因数分解:

$2^3\times 7^1\times {\mathrm{19}}^1\times {\mathrm{59}}^1\times {\mathrm{337}}^1$

素因数の和:428

約数の個数: 64

約数和(自身を含む): 48672000

約数和(自身を除く): 27516488

約数列:

[1, 2, 4, 7, 8, 14, 19, 28, 38, 56, 59, 76, 118, 133, 152, 236, 266, 337, 413, 472, 532, 674, 826, 1064, 1121, 1348, 1652, 2242, 2359, 2696, 3304, 4484, 4718, 6403, 7847, 8968, 9436, 12806, 15694, 18872, 19883, 25612, 31388, 39766, 44821, 51224, 62776, 79532, 89642, 139181, 159064, 179284, 278362, 358568, 377777, 556724, 755554, 1113448, 1511108, 2644439, 3022216, 5288878, 10577756, 21155512]

約数ペア:

[(1, 21155512), (2, 10577756), (4, 5288878), (7, 3022216), (8, 2644439), (14, 1511108), (19, 1113448), (28, 755554), (38, 556724), (56, 377777), (59, 358568), (76, 278362), (118, 179284), (133, 159064), (152, 139181), (236, 89642), (266, 79532), (337, 62776), (413, 51224), (472, 44821), (532, 39766), (674, 31388), (826, 25612), (1064, 19883), (1121, 18872), (1348, 15694), (1652, 12806), (2242, 9436), (2359, 8968), (2696, 7847), (3304, 6403), (4484, 4718)]