21235816

素因数分解:

$2^3\times 7^3\times {\mathrm{71}}^1\times {\mathrm{109}}^1$

素因数の和:207

約数の個数: 64

約数和(自身を含む): 47520000

約数和(自身を除く): 26284184

約数列:

[1, 2, 4, 7, 8, 14, 28, 49, 56, 71, 98, 109, 142, 196, 218, 284, 343, 392, 436, 497, 568, 686, 763, 872, 994, 1372, 1526, 1988, 2744, 3052, 3479, 3976, 5341, 6104, 6958, 7739, 10682, 13916, 15478, 21364, 24353, 27832, 30956, 37387, 42728, 48706, 54173, 61912, 74774, 97412, 108346, 149548, 194824, 216692, 299096, 379211, 433384, 758422, 1516844, 2654477, 3033688, 5308954, 10617908, 21235816]

約数ペア:

[(1, 21235816), (2, 10617908), (4, 5308954), (7, 3033688), (8, 2654477), (14, 1516844), (28, 758422), (49, 433384), (56, 379211), (71, 299096), (98, 216692), (109, 194824), (142, 149548), (196, 108346), (218, 97412), (284, 74774), (343, 61912), (392, 54173), (436, 48706), (497, 42728), (568, 37387), (686, 30956), (763, 27832), (872, 24353), (994, 21364), (1372, 15478), (1526, 13916), (1988, 10682), (2744, 7739), (3052, 6958), (3479, 6104), (3976, 5341)]