20954512

素因数分解:

$2^4\times {\mathrm{31}}^1\times {\mathrm{83}}^1\times {\mathrm{509}}^1$

素因数の和:631

約数の個数: 40

約数和(自身を含む): 42497280

約数和(自身を除く): 21542768

約数列:

[1, 2, 4, 8, 16, 31, 62, 83, 124, 166, 248, 332, 496, 509, 664, 1018, 1328, 2036, 2573, 4072, 5146, 8144, 10292, 15779, 20584, 31558, 41168, 42247, 63116, 84494, 126232, 168988, 252464, 337976, 675952, 1309657, 2619314, 5238628, 10477256, 20954512]

約数ペア:

[(1, 20954512), (2, 10477256), (4, 5238628), (8, 2619314), (16, 1309657), (31, 675952), (62, 337976), (83, 252464), (124, 168988), (166, 126232), (248, 84494), (332, 63116), (496, 42247), (509, 41168), (664, 31558), (1018, 20584), (1328, 15779), (2036, 10292), (2573, 8144), (4072, 5146)]