21240128

素因数分解:

$2^6\times 7^2\times {\mathrm{13}}^1\times {\mathrm{521}}^1$

素因数の和:560

約数の個数: 84

約数和(自身を含む): 52902612

約数和(自身を除く): 31662484

約数列:

[1, 2, 4, 7, 8, 13, 14, 16, 26, 28, 32, 49, 52, 56, 64, 91, 98, 104, 112, 182, 196, 208, 224, 364, 392, 416, 448, 521, 637, 728, 784, 832, 1042, 1274, 1456, 1568, 2084, 2548, 2912, 3136, 3647, 4168, 5096, 5824, 6773, 7294, 8336, 10192, 13546, 14588, 16672, 20384, 25529, 27092, 29176, 33344, 40768, 47411, 51058, 54184, 58352, 94822, 102116, 108368, 116704, 189644, 204232, 216736, 233408, 331877, 379288, 408464, 433472, 663754, 758576, 816928, 1327508, 1517152, 1633856, 2655016, 3034304, 5310032, 10620064, 21240128]

約数ペア:

[(1, 21240128), (2, 10620064), (4, 5310032), (7, 3034304), (8, 2655016), (13, 1633856), (14, 1517152), (16, 1327508), (26, 816928), (28, 758576), (32, 663754), (49, 433472), (52, 408464), (56, 379288), (64, 331877), (91, 233408), (98, 216736), (104, 204232), (112, 189644), (182, 116704), (196, 108368), (208, 102116), (224, 94822), (364, 58352), (392, 54184), (416, 51058), (448, 47411), (521, 40768), (637, 33344), (728, 29176), (784, 27092), (832, 25529), (1042, 20384), (1274, 16672), (1456, 14588), (1568, 13546), (2084, 10192), (2548, 8336), (2912, 7294), (3136, 6773), (3647, 5824), (4168, 5096)]