21509805

素因数分解:

$3^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{1063}}^1$

素因数の和:1161

約数の個数: 32

約数和(自身を含む): 36771840

約数和(自身を除く): 15262035

約数列:

[1, 3, 5, 15, 19, 57, 71, 95, 213, 285, 355, 1063, 1065, 1349, 3189, 4047, 5315, 6745, 15945, 20197, 20235, 60591, 75473, 100985, 226419, 302955, 377365, 1132095, 1433987, 4301961, 7169935, 21509805]

約数ペア:

[(1, 21509805), (3, 7169935), (5, 4301961), (15, 1433987), (19, 1132095), (57, 377365), (71, 302955), (95, 226419), (213, 100985), (285, 75473), (355, 60591), (1063, 20235), (1065, 20197), (1349, 15945), (3189, 6745), (4047, 5315)]