21740978

素因数分解:

$2^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{47}}^2$

素因数の和:159

約数の個数: 48

約数和(自身を含む): 41167680

約数和(自身を除く): 19426702

約数列:

[1, 2, 7, 14, 19, 37, 38, 47, 74, 94, 133, 259, 266, 329, 518, 658, 703, 893, 1406, 1739, 1786, 2209, 3478, 4418, 4921, 6251, 9842, 12173, 12502, 15463, 24346, 30926, 33041, 41971, 66082, 81733, 83942, 163466, 231287, 293797, 462574, 572131, 587594, 1144262, 1552927, 3105854, 10870489, 21740978]

約数ペア:

[(1, 21740978), (2, 10870489), (7, 3105854), (14, 1552927), (19, 1144262), (37, 587594), (38, 572131), (47, 462574), (74, 293797), (94, 231287), (133, 163466), (259, 83942), (266, 81733), (329, 66082), (518, 41971), (658, 33041), (703, 30926), (893, 24346), (1406, 15463), (1739, 12502), (1786, 12173), (2209, 9842), (3478, 6251), (4418, 4921)]