21379788

素因数分解:

$2^2\times 3^4\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{151}}^1$

素因数の和:209

約数の個数: 120

約数和(自身を含む): 61797120

約数和(自身を除く): 40417332

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 19, 23, 27, 36, 38, 46, 54, 57, 69, 76, 81, 92, 108, 114, 138, 151, 162, 171, 207, 228, 276, 302, 324, 342, 414, 437, 453, 513, 604, 621, 684, 828, 874, 906, 1026, 1242, 1311, 1359, 1539, 1748, 1812, 1863, 2052, 2484, 2622, 2718, 2869, 3078, 3473, 3726, 3933, 4077, 5244, 5436, 5738, 6156, 6946, 7452, 7866, 8154, 8607, 10419, 11476, 11799, 12231, 13892, 15732, 16308, 17214, 20838, 23598, 24462, 25821, 31257, 34428, 35397, 41676, 47196, 48924, 51642, 62514, 65987, 70794, 77463, 93771, 103284, 125028, 131974, 141588, 154926, 187542, 197961, 232389, 263948, 281313, 309852, 375084, 395922, 464778, 562626, 593883, 791844, 929556, 1125252, 1187766, 1781649, 2375532, 3563298, 5344947, 7126596, 10689894, 21379788]

約数ペア:

[(1, 21379788), (2, 10689894), (3, 7126596), (4, 5344947), (6, 3563298), (9, 2375532), (12, 1781649), (18, 1187766), (19, 1125252), (23, 929556), (27, 791844), (36, 593883), (38, 562626), (46, 464778), (54, 395922), (57, 375084), (69, 309852), (76, 281313), (81, 263948), (92, 232389), (108, 197961), (114, 187542), (138, 154926), (151, 141588), (162, 131974), (171, 125028), (207, 103284), (228, 93771), (276, 77463), (302, 70794), (324, 65987), (342, 62514), (414, 51642), (437, 48924), (453, 47196), (513, 41676), (604, 35397), (621, 34428), (684, 31257), (828, 25821), (874, 24462), (906, 23598), (1026, 20838), (1242, 17214), (1311, 16308), (1359, 15732), (1539, 13892), (1748, 12231), (1812, 11799), (1863, 11476), (2052, 10419), (2484, 8607), (2622, 8154), (2718, 7866), (2869, 7452), (3078, 6946), (3473, 6156), (3726, 5738), (3933, 5436), (4077, 5244)]