21855920

素因数分解:

$2^4\times 5^1\times {\mathrm{359}}^1\times {\mathrm{761}}^1$

素因数の和:1133

約数の個数: 40

約数和(自身を含む): 51023520

約数和(自身を除く): 29167600

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 359, 718, 761, 1436, 1522, 1795, 2872, 3044, 3590, 3805, 5744, 6088, 7180, 7610, 12176, 14360, 15220, 28720, 30440, 60880, 273199, 546398, 1092796, 1365995, 2185592, 2731990, 4371184, 5463980, 10927960, 21855920]

約数ペア:

[(1, 21855920), (2, 10927960), (4, 5463980), (5, 4371184), (8, 2731990), (10, 2185592), (16, 1365995), (20, 1092796), (40, 546398), (80, 273199), (359, 60880), (718, 30440), (761, 28720), (1436, 15220), (1522, 14360), (1795, 12176), (2872, 7610), (3044, 7180), (3590, 6088), (3805, 5744)]