19729528

素因数分解:

$2^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{661}}^1$

素因数の和:728

約数の個数: 64

約数和(自身を含む): 46710720

約数和(自身を除く): 26981192

約数列:

[1, 2, 4, 7, 8, 13, 14, 26, 28, 41, 52, 56, 82, 91, 104, 164, 182, 287, 328, 364, 533, 574, 661, 728, 1066, 1148, 1322, 2132, 2296, 2644, 3731, 4264, 4627, 5288, 7462, 8593, 9254, 14924, 17186, 18508, 27101, 29848, 34372, 37016, 54202, 60151, 68744, 108404, 120302, 189707, 216808, 240604, 352313, 379414, 481208, 704626, 758828, 1409252, 1517656, 2466191, 2818504, 4932382, 9864764, 19729528]

約数ペア:

[(1, 19729528), (2, 9864764), (4, 4932382), (7, 2818504), (8, 2466191), (13, 1517656), (14, 1409252), (26, 758828), (28, 704626), (41, 481208), (52, 379414), (56, 352313), (82, 240604), (91, 216808), (104, 189707), (164, 120302), (182, 108404), (287, 68744), (328, 60151), (364, 54202), (533, 37016), (574, 34372), (661, 29848), (728, 27101), (1066, 18508), (1148, 17186), (1322, 14924), (2132, 9254), (2296, 8593), (2644, 7462), (3731, 5288), (4264, 4627)]