21078876

素因数分解:

$2^2\times 3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{97}}^1\times {\mathrm{199}}^1$

素因数の和:323

約数の個数: 96

約数和(自身を含む): 61465600

約数和(自身を除く): 40386724

約数列:

[1, 2, 3, 4, 6, 7, 12, 13, 14, 21, 26, 28, 39, 42, 52, 78, 84, 91, 97, 156, 182, 194, 199, 273, 291, 364, 388, 398, 546, 582, 597, 679, 796, 1092, 1164, 1194, 1261, 1358, 1393, 2037, 2388, 2522, 2587, 2716, 2786, 3783, 4074, 4179, 5044, 5174, 5572, 7566, 7761, 8148, 8358, 8827, 10348, 15132, 15522, 16716, 17654, 18109, 19303, 26481, 31044, 35308, 36218, 38606, 52962, 54327, 57909, 72436, 77212, 105924, 108654, 115818, 135121, 217308, 231636, 250939, 270242, 405363, 501878, 540484, 752817, 810726, 1003756, 1505634, 1621452, 1756573, 3011268, 3513146, 5269719, 7026292, 10539438, 21078876]

約数ペア:

[(1, 21078876), (2, 10539438), (3, 7026292), (4, 5269719), (6, 3513146), (7, 3011268), (12, 1756573), (13, 1621452), (14, 1505634), (21, 1003756), (26, 810726), (28, 752817), (39, 540484), (42, 501878), (52, 405363), (78, 270242), (84, 250939), (91, 231636), (97, 217308), (156, 135121), (182, 115818), (194, 108654), (199, 105924), (273, 77212), (291, 72436), (364, 57909), (388, 54327), (398, 52962), (546, 38606), (582, 36218), (597, 35308), (679, 31044), (796, 26481), (1092, 19303), (1164, 18109), (1194, 17654), (1261, 16716), (1358, 15522), (1393, 15132), (2037, 10348), (2388, 8827), (2522, 8358), (2587, 8148), (2716, 7761), (2786, 7566), (3783, 5572), (4074, 5174), (4179, 5044)]