21321315

素因数分解:

$3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{47}}^1\times {\mathrm{593}}^1$

素因数の和:668

約数の個数: 48

約数和(自身を含む): 40030848

約数和(自身を除く): 18709533

約数列:

[1, 3, 5, 9, 15, 17, 45, 47, 51, 85, 141, 153, 235, 255, 423, 593, 705, 765, 799, 1779, 2115, 2397, 2965, 3995, 5337, 7191, 8895, 10081, 11985, 26685, 27871, 30243, 35955, 50405, 83613, 90729, 139355, 151215, 250839, 418065, 453645, 473807, 1254195, 1421421, 2369035, 4264263, 7107105, 21321315]

約数ペア:

[(1, 21321315), (3, 7107105), (5, 4264263), (9, 2369035), (15, 1421421), (17, 1254195), (45, 473807), (47, 453645), (51, 418065), (85, 250839), (141, 151215), (153, 139355), (235, 90729), (255, 83613), (423, 50405), (593, 35955), (705, 30243), (765, 27871), (799, 26685), (1779, 11985), (2115, 10081), (2397, 8895), (2965, 7191), (3995, 5337)]