21251055

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{29}}^1\times {\mathrm{997}}^1$

素因数の和:1048

約数の個数: 48

約数和(自身を含む): 40957920

約数和(自身を除く): 19706865

約数列:

[1, 3, 5, 7, 15, 21, 29, 35, 49, 87, 105, 145, 147, 203, 245, 435, 609, 735, 997, 1015, 1421, 2991, 3045, 4263, 4985, 6979, 7105, 14955, 20937, 21315, 28913, 34895, 48853, 86739, 104685, 144565, 146559, 202391, 244265, 433695, 607173, 732795, 1011955, 1416737, 3035865, 4250211, 7083685, 21251055]

約数ペア:

[(1, 21251055), (3, 7083685), (5, 4250211), (7, 3035865), (15, 1416737), (21, 1011955), (29, 732795), (35, 607173), (49, 433695), (87, 244265), (105, 202391), (145, 146559), (147, 144565), (203, 104685), (245, 86739), (435, 48853), (609, 34895), (735, 28913), (997, 21315), (1015, 20937), (1421, 14955), (2991, 7105), (3045, 6979), (4263, 4985)]