21584240

素因数分解:

$2^4\times 5^1\times {\mathrm{61}}^1\times {\mathrm{4423}}^1$

素因数の和:4497

約数の個数: 40

約数和(自身を含む): 51017568

約数和(自身を除く): 29433328

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 61, 80, 122, 244, 305, 488, 610, 976, 1220, 2440, 4423, 4880, 8846, 17692, 22115, 35384, 44230, 70768, 88460, 176920, 269803, 353840, 539606, 1079212, 1349015, 2158424, 2698030, 4316848, 5396060, 10792120, 21584240]

約数ペア:

[(1, 21584240), (2, 10792120), (4, 5396060), (5, 4316848), (8, 2698030), (10, 2158424), (16, 1349015), (20, 1079212), (40, 539606), (61, 353840), (80, 269803), (122, 176920), (244, 88460), (305, 70768), (488, 44230), (610, 35384), (976, 22115), (1220, 17692), (2440, 8846), (4423, 4880)]