21513177

素因数分解:

$3^2\times 7^1\times {\mathrm{17}}^1\times {\mathrm{53}}^1\times {\mathrm{379}}^1$

素因数の和:462

約数の個数: 48

約数和(自身を含む): 38413440

約数和(自身を除く): 16900263

約数列:

[1, 3, 7, 9, 17, 21, 51, 53, 63, 119, 153, 159, 357, 371, 379, 477, 901, 1071, 1113, 1137, 2653, 2703, 3339, 3411, 6307, 6443, 7959, 8109, 18921, 19329, 20087, 23877, 45101, 56763, 57987, 60261, 135303, 140609, 180783, 341479, 405909, 421827, 1024437, 1265481, 2390353, 3073311, 7171059, 21513177]

約数ペア:

[(1, 21513177), (3, 7171059), (7, 3073311), (9, 2390353), (17, 1265481), (21, 1024437), (51, 421827), (53, 405909), (63, 341479), (119, 180783), (153, 140609), (159, 135303), (357, 60261), (371, 57987), (379, 56763), (477, 45101), (901, 23877), (1071, 20087), (1113, 19329), (1137, 18921), (2653, 8109), (2703, 7959), (3339, 6443), (3411, 6307)]