21331737

素因数分解:

$3^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{251}}^1$

素因数の和:354

約数の個数: 48

約数和(自身を含む): 37739520

約数和(自身を除く): 16407783

約数列:

[1, 3, 7, 9, 19, 21, 57, 63, 71, 133, 171, 213, 251, 399, 497, 639, 753, 1197, 1349, 1491, 1757, 2259, 4047, 4473, 4769, 5271, 9443, 12141, 14307, 15813, 17821, 28329, 33383, 42921, 53463, 84987, 100149, 124747, 160389, 300447, 338599, 374241, 1015797, 1122723, 2370193, 3047391, 7110579, 21331737]

約数ペア:

[(1, 21331737), (3, 7110579), (7, 3047391), (9, 2370193), (19, 1122723), (21, 1015797), (57, 374241), (63, 338599), (71, 300447), (133, 160389), (171, 124747), (213, 100149), (251, 84987), (399, 53463), (497, 42921), (639, 33383), (753, 28329), (1197, 17821), (1349, 15813), (1491, 14307), (1757, 12141), (2259, 9443), (4047, 5271), (4473, 4769)]