20998724

素因数分解:

$2^2\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{41}}^1\times {\mathrm{293}}^1$

素因数の和:380

約数の個数: 48

約数和(自身を含む): 41489280

約数和(自身を除く): 20490556

約数列:

[1, 2, 4, 19, 23, 38, 41, 46, 76, 82, 92, 164, 293, 437, 586, 779, 874, 943, 1172, 1558, 1748, 1886, 3116, 3772, 5567, 6739, 11134, 12013, 13478, 17917, 22268, 24026, 26956, 35834, 48052, 71668, 128041, 228247, 256082, 276299, 456494, 512164, 552598, 912988, 1105196, 5249681, 10499362, 20998724]

約数ペア:

[(1, 20998724), (2, 10499362), (4, 5249681), (19, 1105196), (23, 912988), (38, 552598), (41, 512164), (46, 456494), (76, 276299), (82, 256082), (92, 228247), (164, 128041), (293, 71668), (437, 48052), (586, 35834), (779, 26956), (874, 24026), (943, 22268), (1172, 17917), (1558, 13478), (1748, 12013), (1886, 11134), (3116, 6739), (3772, 5567)]