21531055

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{599}}^1$

素因数の和:703

約数の個数: 32

約数和(自身を含む): 32256000

約数和(自身を除く): 10724945

約数列:

[1, 5, 7, 13, 35, 65, 79, 91, 395, 455, 553, 599, 1027, 2765, 2995, 4193, 5135, 7189, 7787, 20965, 35945, 38935, 47321, 54509, 236605, 272545, 331247, 615173, 1656235, 3075865, 4306211, 21531055]

約数ペア:

[(1, 21531055), (5, 4306211), (7, 3075865), (13, 1656235), (35, 615173), (65, 331247), (79, 272545), (91, 236605), (395, 54509), (455, 47321), (553, 38935), (599, 35945), (1027, 20965), (2765, 7787), (2995, 7189), (4193, 5135)]