21154220

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{179}}^1\times {\mathrm{311}}^1$

素因数の和:518

約数の個数: 48

約数和(自身を含む): 47174400

約数和(自身を除く): 26020180

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 179, 190, 311, 358, 380, 622, 716, 895, 1244, 1555, 1790, 3110, 3401, 3580, 5909, 6220, 6802, 11818, 13604, 17005, 23636, 29545, 34010, 55669, 59090, 68020, 111338, 118180, 222676, 278345, 556690, 1057711, 1113380, 2115422, 4230844, 5288555, 10577110, 21154220]

約数ペア:

[(1, 21154220), (2, 10577110), (4, 5288555), (5, 4230844), (10, 2115422), (19, 1113380), (20, 1057711), (38, 556690), (76, 278345), (95, 222676), (179, 118180), (190, 111338), (311, 68020), (358, 59090), (380, 55669), (622, 34010), (716, 29545), (895, 23636), (1244, 17005), (1555, 13604), (1790, 11818), (3110, 6802), (3401, 6220), (3580, 5909)]