20940381

素因数分解:

$3^2\times 7^1\times {\mathrm{11}}^2\times {\mathrm{41}}^1\times {\mathrm{67}}^1$

素因数の和:143

約数の個数: 72

約数和(自身を含む): 39504192

約数和(自身を除く): 18563811

約数列:

[1, 3, 7, 9, 11, 21, 33, 41, 63, 67, 77, 99, 121, 123, 201, 231, 287, 363, 369, 451, 469, 603, 693, 737, 847, 861, 1089, 1353, 1407, 2211, 2541, 2583, 2747, 3157, 4059, 4221, 4961, 5159, 6633, 7623, 8107, 8241, 9471, 14883, 15477, 19229, 24321, 24723, 28413, 30217, 34727, 44649, 46431, 56749, 57687, 72963, 90651, 104181, 170247, 173061, 211519, 271953, 312543, 332387, 510741, 634557, 997161, 1903671, 2326709, 2991483, 6980127, 20940381]

約数ペア:

[(1, 20940381), (3, 6980127), (7, 2991483), (9, 2326709), (11, 1903671), (21, 997161), (33, 634557), (41, 510741), (63, 332387), (67, 312543), (77, 271953), (99, 211519), (121, 173061), (123, 170247), (201, 104181), (231, 90651), (287, 72963), (363, 57687), (369, 56749), (451, 46431), (469, 44649), (603, 34727), (693, 30217), (737, 28413), (847, 24723), (861, 24321), (1089, 19229), (1353, 15477), (1407, 14883), (2211, 9471), (2541, 8241), (2583, 8107), (2747, 7623), (3157, 6633), (4059, 5159), (4221, 4961)]