21291504

素因数分解:

$2^4\times 3^1\times {\mathrm{13}}^1\times {\mathrm{149}}^1\times {\mathrm{229}}^1$

素因数の和:402

約数の個数: 80

約数和(自身を含む): 59892000

約数和(自身を除く): 38600496

約数列:

[1, 2, 3, 4, 6, 8, 12, 13, 16, 24, 26, 39, 48, 52, 78, 104, 149, 156, 208, 229, 298, 312, 447, 458, 596, 624, 687, 894, 916, 1192, 1374, 1788, 1832, 1937, 2384, 2748, 2977, 3576, 3664, 3874, 5496, 5811, 5954, 7152, 7748, 8931, 10992, 11622, 11908, 15496, 17862, 23244, 23816, 30992, 34121, 35724, 46488, 47632, 68242, 71448, 92976, 102363, 136484, 142896, 204726, 272968, 409452, 443573, 545936, 818904, 887146, 1330719, 1637808, 1774292, 2661438, 3548584, 5322876, 7097168, 10645752, 21291504]

約数ペア:

[(1, 21291504), (2, 10645752), (3, 7097168), (4, 5322876), (6, 3548584), (8, 2661438), (12, 1774292), (13, 1637808), (16, 1330719), (24, 887146), (26, 818904), (39, 545936), (48, 443573), (52, 409452), (78, 272968), (104, 204726), (149, 142896), (156, 136484), (208, 102363), (229, 92976), (298, 71448), (312, 68242), (447, 47632), (458, 46488), (596, 35724), (624, 34121), (687, 30992), (894, 23816), (916, 23244), (1192, 17862), (1374, 15496), (1788, 11908), (1832, 11622), (1937, 10992), (2384, 8931), (2748, 7748), (2977, 7152), (3576, 5954), (3664, 5811), (3874, 5496)]