21002475

素因数分解:

$3^1\times 5^2\times {\mathrm{13}}^2\times {\mathrm{1657}}^1$

素因数の和:1696

約数の個数: 36

約数和(自身を含む): 37623336

約数和(自身を除く): 16620861

約数列:

[1, 3, 5, 13, 15, 25, 39, 65, 75, 169, 195, 325, 507, 845, 975, 1657, 2535, 4225, 4971, 8285, 12675, 21541, 24855, 41425, 64623, 107705, 124275, 280033, 323115, 538525, 840099, 1400165, 1615575, 4200495, 7000825, 21002475]

約数ペア:

[(1, 21002475), (3, 7000825), (5, 4200495), (13, 1615575), (15, 1400165), (25, 840099), (39, 538525), (65, 323115), (75, 280033), (169, 124275), (195, 107705), (325, 64623), (507, 41425), (845, 24855), (975, 21541), (1657, 12675), (2535, 8285), (4225, 4971)]