21157148

素因数分解:

$2^2\times {\mathrm{23}}^1\times {\mathrm{41}}^1\times {\mathrm{71}}^1\times {\mathrm{79}}^1$

素因数の和:218

約数の個数: 48

約数和(自身を含む): 40642560

約数和(自身を除く): 19485412

約数列:

[1, 2, 4, 23, 41, 46, 71, 79, 82, 92, 142, 158, 164, 284, 316, 943, 1633, 1817, 1886, 2911, 3239, 3266, 3634, 3772, 5609, 5822, 6478, 6532, 7268, 11218, 11644, 12956, 22436, 66953, 74497, 129007, 133906, 148994, 229969, 258014, 267812, 297988, 459938, 516028, 919876, 5289287, 10578574, 21157148]

約数ペア:

[(1, 21157148), (2, 10578574), (4, 5289287), (23, 919876), (41, 516028), (46, 459938), (71, 297988), (79, 267812), (82, 258014), (92, 229969), (142, 148994), (158, 133906), (164, 129007), (284, 74497), (316, 66953), (943, 22436), (1633, 12956), (1817, 11644), (1886, 11218), (2911, 7268), (3239, 6532), (3266, 6478), (3634, 5822), (3772, 5609)]