21178976

素因数分解:

$2^5\times 7^2\times {\mathrm{13}}^1\times {\mathrm{1039}}^1$

素因数の和:1076

約数の個数: 72

約数和(自身を含む): 52284960

約数和(自身を除く): 31105984

約数列:

[1, 2, 4, 7, 8, 13, 14, 16, 26, 28, 32, 49, 52, 56, 91, 98, 104, 112, 182, 196, 208, 224, 364, 392, 416, 637, 728, 784, 1039, 1274, 1456, 1568, 2078, 2548, 2912, 4156, 5096, 7273, 8312, 10192, 13507, 14546, 16624, 20384, 27014, 29092, 33248, 50911, 54028, 58184, 94549, 101822, 108056, 116368, 189098, 203644, 216112, 232736, 378196, 407288, 432224, 661843, 756392, 814576, 1323686, 1512784, 1629152, 2647372, 3025568, 5294744, 10589488, 21178976]

約数ペア:

[(1, 21178976), (2, 10589488), (4, 5294744), (7, 3025568), (8, 2647372), (13, 1629152), (14, 1512784), (16, 1323686), (26, 814576), (28, 756392), (32, 661843), (49, 432224), (52, 407288), (56, 378196), (91, 232736), (98, 216112), (104, 203644), (112, 189098), (182, 116368), (196, 108056), (208, 101822), (224, 94549), (364, 58184), (392, 54028), (416, 50911), (637, 33248), (728, 29092), (784, 27014), (1039, 20384), (1274, 16624), (1456, 14546), (1568, 13507), (2078, 10192), (2548, 8312), (2912, 7273), (4156, 5096)]