21957255

素因数分解:

$3^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{421}}^1$

素因数の和:512

約数の個数: 48

約数和(自身を含む): 40815840

約数和(自身を除く): 18858585

約数列:

[1, 3, 5, 9, 15, 19, 45, 57, 61, 95, 171, 183, 285, 305, 421, 549, 855, 915, 1159, 1263, 2105, 2745, 3477, 3789, 5795, 6315, 7999, 10431, 17385, 18945, 23997, 25681, 39995, 52155, 71991, 77043, 119985, 128405, 231129, 359955, 385215, 487939, 1155645, 1463817, 2439695, 4391451, 7319085, 21957255]

約数ペア:

[(1, 21957255), (3, 7319085), (5, 4391451), (9, 2439695), (15, 1463817), (19, 1155645), (45, 487939), (57, 385215), (61, 359955), (95, 231129), (171, 128405), (183, 119985), (285, 77043), (305, 71991), (421, 52155), (549, 39995), (855, 25681), (915, 23997), (1159, 18945), (1263, 17385), (2105, 10431), (2745, 7999), (3477, 6315), (3789, 5795)]